# IJCCRL > Sharing rating chess engines list, computer chess and tech. ## Posts - [Revolution dev v.1.0 030925](https://ijccrl.com/revolution-dev-v-1-0-030925/): Summary ¡Gracias por los archivos, Jorge! Los he inspeccionado byte a byte y el fallo de “archivo no válido” del desfragmentador de Hypnos es totalmente coherente: los dos .exp no comparten el mismo formato. Al combinarlos se “rompen” porque el programa de Hypnos espera una cabecera y un tamaño de registro concretos que tu experience.exp no tiene. A continuación te dejo, claro y accionable, qué es cada formato, en qué difieren exactamente y qué indicaciones dar a Codex para que Revolution escriba ficheros compatibles con Hypnos (A46.exp / SugaR v2). Qué hay en cada archivo 1) A46.exp Conclusión práctica: El desfragmentador…  - [Optimizing Windows 10 Pro Workstation Performance](https://ijccrl.com/optimizing-windows-10-pro-workstation-performance/): Optimizing Windows 10 Pro Workstation Performance: A Comprehensive Guide Abstract This article offers a systematic, SEO-optimized exploration of how to enhance the performance, stability, and responsiveness of Windows 10 Pro workstations, particularly in demanding environments such as professional workstations. Drawing upon Microsoft’s official recommendations, industry analyses, and reputable open-source utilities, it outlines meticulous strategies across system updates, resource management, system services, visual adjustments, and underlying hardware. Finally, the article introduces a reusable PowerShell script to automate these optimizations—providing both theoretical clarity and practical implementation. 1. Introduction Windows 10 Pro serves as a common choice for workstations in engineering, architecture, video production, and enterprise applications. Despite…  - [Experience File Integration in Revolution](https://ijccrl.com/experience-file-integration-in-revolution/): Experience file in revolution Abstract This article analyses the integration of the experience file feature in the Revolution UCI chess engine. We address whether the experience file functions purely as a static opening tree or as a dynamic learning feature. Through code inspection and conceptual comparison with other UCI engines (such as Stockfish, BrainLearn, and SugaR), we clarify Revolution’s design philosophy and implications for programmers seeking to leverage or extend this functionality. 1. Introduction Modern chess engines rely on multiple data sources to enhance play: The key question: Does Revolution’s experience file enable learning, or is it only a static move…  - [Refine root search bounds add Slow Mover to Wordfish 2.0](https://ijccrl.com/refine-root-search-bounds-add-slow-mover-to-wordfish-2-0/): Summary Wordfish 2.0 Refine root search bounds search.cpp Timeman.cpp Download last update - [SPRT TEST of Revolution 1.0.1 dev vs Revolution 1.0](https://ijccrl.com/sprt-test-of-revolution-1-0-1-dev-vs-revolution-1-0/): Here is a professional interpretation of your test results, framed in the style of a senior computer scientist with a background in mathematics. I will combine the statistical framework of SPRT testing (as illustrated in the sources you provided) with the empirical outcome of your own Revolution 1.0.1 dev vs. Revolution match. Interpretation of Revolution 1.0.1 dev vs Revolution 1.0 Test conditions Raw outcomes Elo statistics SPRT context Mathematical interpretation Conclusion Final statement At present, Revolution 1.0.1 dev cannot be confidently said to be stronger than Revolution 1.0, although the data slightly favours the development version. If the trend holds with…  - [revolution 1.0.1 dev vs revolution 1.0](https://ijccrl.com/revolution-1-0-1-dev-vs-revolution-1-0/): revolution 1.0.1 dev vs revolution 1.0 — SPRT Test Summary Date: 31 August 2025 · Time control: 10+0.1 · Threads: 1 · Hash: 32 MB · Openings: UHO_2024_8mvs_+085_+094.pgn We ran 1,792 games comparing Wordfish 1.0 dev against the baseline Wordfish 1.0. The development build scored 48.44% with an Elo difference of –10.9 ± 8.8 and a Likelihood of Superiority (LOS) of 0.79%. These figures indicate no Elo gain; in fact, a modest loss under the tested conditions. Key numbers Conclusion Under these conditions, Wordfish 1.0 dev is approximately 11 Elo weaker than the baseline Wordfish 1.0. The LOS well below 50%…  - [Experience file and SPRT test](https://ijccrl.com/experience-file-and-sprt-test/): Summary Testing Experience Learning Engine.cpp Search.cpp Changelog Added Engine now appends the build date after its name in UCI identification. UCI option Minimum Thinking Time to enforce a minimum search duration per move. Download revolution dev 300825 - [Adjusted Iterative Time Bounds revolution chess engine](https://ijccrl.com/adjusted-iterative-time-bounds-revolution-chess-engine/): Summary Testing Notes Perfect. I’ll prepare the full ~3000-word SEO-friendly article, with embedded tables and pseudo-graphs to illustrate the improvements in Revolution’s time management. Adjusted Iterative Time Bounds in the Revolution Matching Tuned Iteration-Bound Weights for More Accurate Search Timing 1. Introduction Time is the most precious resource in competitive chess. For a human player, spending too long on a single move risks flagging in time trouble; for a chess engine, inefficient use of time leads to truncated searches, missed tactics, or shallow analysis in critical positions. Modern engines like Revolution and Stockfish rely on iterative deepening search (IDS) to determine…  - [Revolution SPRT completed - H1 was accepted](https://ijccrl.com/revolution-sprt-completed-h1-was-accepted/): Summary What your numbers say (the short answer) So, yes—there is a real, material gain. At this time control and setup, expect roughly 54.4% score for the dev vs the old version (you observed 54.40%), which is exactly consistent with ~+30.6 Elo. How those fields map to strength Context and caveats Bottom line At 10+0.1 (1t, 32 MB, UHO_2024_8mvs_+085_+094):Revolution 1.0 (dev) ≈ +30.6 Elo vs the old Wordfish, with a 95% CI ≈ +16.5 to +44.8 Elo, and SPRT conclusively accepts H1. That’s a solid, practically meaningful gain at this TC. References for methodology: Rustic’s SPRT guide/results and Fishtest stats pages…  - [How to train Phase 1 (LS01) .exp of revolution](https://ijccrl.com/how-to-train-phase-1-ls01-exp-of-revolution/): ECO Statistics D45 315 4 1 D43 309 2 0 C11 230 6 2 D38 224 0 0 A00 221 0 0 B00 206 20 9 C02 201 3 1 That’s it! I’ve uploaded your ECO Statistics.csv file , selected the 10 highest priority lines (based on “Total Games”), and generated a PGN LS01 suite with each line limited to 8 full moves (16 plies) whenever possible. Downloads Note: Your CSV doesn’t include the movement sequence (there’s no column of moves); therefore, where I couldn’t reconstruct the line, I’ve left aplaceholder commentinside the PGN so you can paste the SAN you…  - [Syzygy Premap Option in Revolution Chess Engine](https://ijccrl.com/syzygy-premap-option-in-revolution-chess-engine/): Understanding the SyzygyPremap Option in Revolution Chess Engine 1. Introduction The world of modern chess engines has evolved far beyond the brute-force searching of earlier decades. With neural evaluation networks, experience files, and advanced probing of tablebases, engines today balance speed, memory efficiency, and accuracy in extraordinary ways. Revolution—a derivative of Stockfish infused with ideas from Berserk and Obsidian—adds yet another innovation: the SyzygyPremap option, available in its UCI (Universal Chess Interface) configuration. This article explores the technical background, implementation, and practical impact of SyzygyPremap. We will compare Revolution’s design to Stockfish, Berserk, and Obsidian, all of which lack this particular…  - [Test Sprt 250825 wordfish 1.0.1 dev versus base](https://ijccrl.com/test-sprt-250825-wordfish-1-0-1-dev-versus-base/): Summary Bottom line How the numbers support that Interpreting SPRT & the LLR (why this is a “no-gain” result) Practical takeaways Final verdict Elo gain of Wordfish 1.0 dev vs the old version: approximately −2.4 Elo (not significant). The SPRT explicitly rejects a +10 Elo gain and supports no improvement under your test conditions. Download games - [Guide of fastchess sprt test](https://ijccrl.com/guide-of-fastchess-sprt-test/): Fastchess on Windows If you’ve ever wished for a fast, modern, Cutechess-style tournament runner that plays nicely with today’s UCI engines, Fastchess is exactly that. In this tutorial we’ll go from zero to running reliable round-robin tournaments and gauntlet-style tests, using PGN/EPD opening suites (and what to do if your book is a Polyglot .bin). Along the way we’ll cover threads, book depth (plies), SPRT, logging, resuming runs, and practical Windows tips so any chess-engine enthusiast can reproduce the results at home. Short version: you’ll download the Windows build from the Fastchess Releases page, extract it, then run commands likefastchess.exe -engine…  - [Add the polyglot function to Wordfish](https://ijccrl.com/add-the-polyglot-function-to-wordfish/): Why the .bin books stopped working in 1.0.1 In Wordfish 1.0 the Polyglot control options had the classic names used by many SF forks (e.g., OwnBook, BookFile, BestBookMove, BookDepth). In 1.0.1 they were renamed to a new family (Book1, Book1 File, …, Book2 …). The search/UC I glue that actually probes the book still expects the classic names, so the new options “show up” in UCI but are never read by the book probe path — hence no book moves in Fritz/Cutechess. Fix: add bidirectional, zero-cost aliases so whichever family the GUI uses, the underlying values stay in sync. No change…  - [SPRT test 200825 wordfish dev vs Base](https://ijccrl.com/sprt-test-200825-wordfish-dev-vs-base/): Summary Bottom line How this squares with the numbers you gave Interpreting LOS, LLR and the SPRT line Practical conclusion BayesElo-style posterior interval from your raw W/L/D: - [Command cutechess-cli](https://ijccrl.com/command-cutechess-cli/): References Cutechess into github Jorge Ruiz connoisseur of both chess and anthropology, a combination that reflects his deep intellectual curiosity and passion for understanding both the art of strategic - [SPRT test 190825](https://ijccrl.com/sprt-test-190825/): Summary (raw lines you gave) Below I explain exactly what each line means, how the SPRT decision rule is applied, how to (approximately) compute the pentanomial vector from your aggregated numbers, and how to judge whether the reported Elo gain is reliable. All core statistical concepts used by Fishtest (pentanomial model, SPRT / GSPRT, the meaning of LLR and bounds) are documented in the Fishtest maths pages and the ChessProgramming reference — I’ll cite those where needed. (Stockfish, Chessprogramming) How to read the page Immediate verdict for your numbers: LLR = 1.94 lies between -2.94 and +2.94, therefore the SPRT has…  - [SPRT TEST dev Wordfish](https://ijccrl.com/sprt-test-dev-wordfish/): SPRT TEST dev Wordfish Direct summary: There is no measurable Elo gain.Your match shows Elo diff = +0.0 ± 4.3 with LOS = 50% and LLR = −0.913, all well within the [−2.94, +2.94] bounds of the SPRT. This means that, with the current data, Wordfish 1.0 dev and Wordfish base play at the same strength within roughly ±4 Elo; the test is inconclusive (neither an accepted improvement nor an accepted regression). How to read your numbers Colour notes (for context) What I would do to close the case Final verdict: With 14,000 games, Wordfish 1.0 dev = Wordfish base (0…  - [Guide SPRT Tests for Chess Engines with cutechess-cli](https://ijccrl.com/guide-sprt-tests-for-chess-engines-with-cutechess-cli/): Mastering Statistical Validation with cutechess-cli 1. Introduction: Why SPRT? In chess engine development, validating strength improvements is critical. The Sequential Probability Ratio Test (SPRT) offers a statistically rigorous way to terminate tests early when results are conclusive, saving CPU time. Developed by Abraham Wald in WWII, SPRT is now standard in projects like Stockfish (see Stockfish Testing Dashboard). Key Advantages: 2. Decoding Your SPRT Output Let’s dissect your provided data: Interpretation:The test leans toward concluding no Elo change, but more games are needed for certainty. 3. SPRT Setup in cutechess-cli: Step-by-Step Tutorial Prerequisites Command Template “`bashcutechess-cli \-engine name=Old cmd=./my_engine_v1 \-engine name=New…  - [Calculating Elo Differences Using SPRT for Chess Engine](https://ijccrl.com/calculating-elo-differences-using-sprt-for-chess-engine/): Introduction (Elo for Chess Engines) The evaluation of chess engine improvements relies on robust statistical methodologies to measure subtle strength differences, typically quantified using the Elo rating system. Developed by Arpad Elo, this system calculates relative skill levels in zero-sum games by modelling expected performance probabilities between opponents. When a chess engine’s expected score against a reference opponent is known, its Elo difference (ΔElo) can be derived through a logarithmic relationship: ΔElo = 400 × log₁₀(expected_score / (1 – expected_score)). This mathematical foundation transforms win/draw/loss outcomes into precise strength estimates, making it indispensable for evaluating algorithmic enhancements in engines like Wordfish 611.…  - [Code changes in Wordfish 1.0](https://ijccrl.com/code-changes-in-wordfish-1-0/): Bug What have I fixed? I’ve fixed the compilation error and updated the version/date to Wordfish 1.0 140825 in the three files you attached. I’ve also made everything available for you to download the corrected files and, if you prefer, apply a unified patch. Before the first use in that function, reusing the same local mask and cache from the translation unit. This eliminates the compilation error with MinGW64. Date/Version to 140825: Downloads 📦 Fixed Sources (ZIP): Download wordfish_140825_sources.zipContains patched evaluate.cpp, main.cpp, misc.cpp + README_CHANGELOG.txt. 🩹 Unified Patch (for git apply): Download wordfish_140825_fix.patch If you’re using Git, go to the root…  - [Compiling Wordfish 1.0 12082025 on Windows](https://ijccrl.com/compiling-wordfish-1-0-12082025-on-windows/): Compiling Wordfish 1.0 12082025 on Windows: A Comprehensive Guide A Step-by-Step Tutorial for Building the Updated Chess Engine 1. Introduction Wordfish 1.0 is an advanced chess engine derived from Stockfish. This guide covers compiling Wordfish 1.0 12082025 (with the fixed release date) on Windows using MinGW64. You’ll learn to: 2. Environment Setup Prerequisites: Step 1: Install MSYS2 Step 2: Install MinGW64 Step 3: Verify Installation 3. Source Code Preparation Step 1: Clone Repository Step 2: Apply Critical FixesEdit these files to enforce version/date: File 1: src/misc.cpp File 2: src/uci.cpp File 3: src/main.cpp 4. Compilation Process Step 1: Create MakefileSave as Makefile:…  - [How use epd Opening Suites with Cutechess-CLI](https://ijccrl.com/how-use-epd-opening-suites-with-cutechess-cli/): Utilising EPD Opening Suites with Cutechess-CLI: A Comprehensive Technical Guide Introduction This guide details the precise methodology for executing chess engine tournaments using EPD-formatted opening suites with cutechess-cli (command-line interface). Building upon your provided script (launch_tournament.cmd), we replace the existing PGN openings with EPD suites while maintaining all other tournament parameters. Key concepts, configuration adjustments, and technical considerations are addressed using British English terminology. 1. Core Differences: PGN vs. EPD in Cutechess-CLI PGN Suites (Original Setup) EPD Suites (New Setup) 2. Modifying Your Script for EPD Suites Critical Changes to the Original Script: Full Modified Script (launch_tournament_epd.cmd): 3. Key Configuration Notes…  - [How to Speed Up Stockfishs Search](https://ijccrl.com/how-to-speed-up-stockfishs-search/): Note Note: This article explains both the theory and concrete code-level changes you can try in Stockfish’s source tree (files such as search.cpp, movepick.cpp, tt.cpp, main.cpp, engine.cpp and uci.cpp). Where web sources are relevant I cite them; because Stockfishs code and line numbers change often, I point to functions and small code diffs rather than rely on fragile absolute line numbers. Before applying changes, back up your repository and test thoroughly. Key references used for this article include the Stockfish repository and the Stockfish developer wiki, plus canonical pages on pruning and heuristics. (GitHub, Stockfish, Chessprogramming) Introduction — what “search speed”…  - [Integrating Polyglot into Stockfish](https://ijccrl.com/integrating-polyglot-into-stockfish/): A Comprehensive Guide for Windows Compilation Introduction Stockfish, the world’s strongest open-source chess engine, lacks native support for Polyglot opening books. This guide details how to integrate the Polyglot 220623 module into Stockfish’s latest source code, enabling book functionality. We’ll cover every step—from modifying source files to MinGW64 compilation on Windows—ensuring even novice developers succeed. Section 1: Prerequisites Section 2: File Integration Step 1: Add Polyglot Files to Stockfish Create directories and copy files: Step 2: Modify Stockfish Headers File: uci.hAdd includes and book declaration: File: position.hDeclare Polyglot key generator: Step 3: Update Position Class File: position.cppImplement polyglot_key(): Step 4: Integrate Book Logic into UCI Declare Book…  - [How compile stockfish on windows](https://ijccrl.com/how-compile-stockfish-on-windows/): Introduction Stockfish is one of the world’s strongest open-source chess engines, continuously maintained and improved by an active community of developers and enthusiasts. Originating as a fork of Glaurung in 2008, Stockfish has gone on to win numerous computer chess championships and power a wealth of chess applications, from desktop graphical interfaces to online analysis servers. Its strength, flexibility, and open-source licence make it a preferred choice for both amateur and professional users who wish to experiment with engine parameters, integrate advanced analysis into their own software, or simply run epic engine-vs-engine battles. Compiling Stockfish from source on Windows provides several…  - [Daily Stockfish 17.1 Dev Builds](https://ijccrl.com/daily-stockfish-17-1-dev-builds/): Daily Stockfish 17.1 Dev Why Subscribe to the Silver Membership for Daily Stockfish 17.1 Dev Builds? As an enthusiast in  computer chess marketing, I emphasize the unparalleled advantage of accessing daily compilations of Stockfish 17.1 Dev via our Silver Membership. Here’s why this offering is indispensable for serious players, analysts, and engine enthusiasts: 1. Cutting-Edge Improvements, Ahead of Official Releases 2. Compiled for Peak Performance & Stability 3. Competitive Edge in Analysis and Play 4. Convenience and Time Savings 5. Exclusive Support & Insights Conclusion: Stay Ahead of the Curve The updates Stockfish 17.1 branch evolves relentlessly. While the official site offers stable snapshots, Silver Membership delivers tomorrow’s advantage today—transforming GitHub commits into…  - [How to Configure Hiarcs on Windows](https://ijccrl.com/how-to-configure-hiarcs-on-windows/): Hiarcs on Windows Introduction Configuring Hiarcs on Windows can initially appear challenging to newcomers, yet with a systematic approach, even those with minimal technical expertise can have the engine up and running smoothly. In this guide, we delve into every aspect of preparing your Windows environment, installing the Hiarcs executable, configuring preferences, and exploring advanced features that make Hiarcs one of the most respected chess engines available. We aim to demystify the process by breaking it down into clear, logical steps, enriched with practical tips and illustrative lists. By adhering to best practices and avoiding unnecessary complications, you will gain confidence…  - [Training Neural Networks of Chess Engines](https://ijccrl.com/training-neural-networks-of-chess-engines/): Introduction The landscape of computer chess has undergone a revolutionary transformation with the integration of neural networks into traditional chess engines. The Universal Chess Interface (UCI) protocol, established as the standard communication protocol between chess engines and graphical user interfaces, now serves as the foundation for next-generation neural network-based engines like Stockfish NNUE (Efficiently Updatable Neural Network). This paradigm shift began around 2018 when Yu Nasu’s NNUE concept was integrated into Stockfish, demonstrating superior positional evaluation compared to classical handcrafted evaluation functions. Training neural networks for chess engines involves creating sophisticated mathematical models that learn to evaluate chess positions by processing…  - [Manage a ChessBase 18 Cloud Database](https://ijccrl.com/manage-a-chessbase-18-cloud-database/): Introduction In the age of cloud computing, the way we store, access and share chess games has fundamentally changed. No longer are we confined to local HDDs or USB sticks; instead, we can maintain our entire repertoire, analysis and game collections online. ChessBase 18 offers a fully integrated Cloud Database feature, accessible via your Playchess account (also known as “MyGames Cloud”), which enables you to create, edit and publish databases from any device with an internet connection (ChessBase). This guide, written by an expert in computer chess, takes you through every stage of the process—from selecting the right database type to…  - [Dutch Defence in Chess Engine Opening Books](https://ijccrl.com/dutch-defence-in-chess-engine-opening-books/): Introduction The Dutch Defence (1.d4 f5) is a combative reply to 1.d4 that immediately stakes a claim on the centre and kingside. It is less popular than openings like 1.d4 d5 or 1.d4 Nf6, but it has unique advantages: Black avoids symmetry and drawing lines, and fights for initiative from the outset. In particular, Dutch systems seek to prevent White’s early e4 push by play like …Nf6 and …g6. As a ChessBase analysis notes, Black’s goal in the Dutch (as with other king-pawn defences) is to “prevent 2.e4” and then follow up with …Nf6 for control of the e4 square. However,…  - [How to Contribute Your Windows 10 PC to Stockfish Fishtest](https://ijccrl.com/how-to-contribute-your-windows-10-pc-to-stockfish-fishtest/): How to Contribute A Step-by-Step Guide Introduction Stockfish is a free and strong UCI chess engine that relies on volunteer computing for testing and improvement. The Stockfish developers use a system called Fishtest – a distributed testing framework – to evaluate changes to the engine by having computers around the world play games automatically. By donating your hardware (CPU power) and running a Fishtest “worker” on your Windows 10 computer, you can help test new Stockfish patches without any programming – the worker handles compiling and running games for you. In other words, no coding is required; once set up, your…  - [Step-by-Step Guide set Neve Free theme WordPress](https://ijccrl.com/step-by-step-guide-set-neve-free-theme-wordpress/): Introduction Creating a professional-looking website with WordPress is straightforward thanks to the vast library of themes and powerful hosting platforms. In this guide, we explain how to install the Neve theme (free version) on a WordPress site hosted with Hostinger Cloud hosting. We will cover every step in detail so that even users with little technical knowledge can follow along. First, we introduce the key components: WordPress, the Neve theme, and Hostinger Cloud hosting. WordPress is an open-source content management system (CMS) that powers millions of websites. A WordPress theme is a collection of files (templates, stylesheets, scripts) that determines a…  - [Setting Up an Apache Streaming Server on Ubuntu 24.04 LTS](https://ijccrl.com/setting-up-an-apache-streaming-server-on-ubuntu-24-04-lts/): Introduction Live streaming requires robust infrastructure. This 4500-word guide details how to automate a professional-grade streaming server using Apache on Ubuntu 24.04 LTS, hosted in VirtualBox on Windows. You’ll master server virtualisation, Apache optimisation, and HLS streaming—critical skills for DevOps engineers and content creators. Phase 1: VirtualBox Setup on Windows (Tools: Windows 11 Host, VirtualBox 7.0+) Phase 2: Ubuntu Server 24.04 LTS Installation (ISO: ubuntu-24.04-live-server-amd64.iso) Phase 3: Apache & Streaming Stack Automation Script: stream-setup.sh (Run as root) Phase 4: Streaming Workflow Phase 5: Security Hardening enabled = true port = 1935 filter = rtmp logpath = /var/log/apache2/error.log maxretry = 3 EOF…  - [How to Use a Local Windows Server to Broadcast a Fritz 20](https://ijccrl.com/how-to-use-a-local-windows-server-to-broadcast-a-fritz-20/): A local server is simply a computer on your home network that provides services (like hosting web pages or running applications) to other devices on that same network. In practice, it is not generally exposed directly to the internet; instead it serves clients in your home or local area network (LAN). For example, an HP ProLiant DL360p Gen8 rack server can act as a powerful local server at home. The ProLiant DL360p Gen8 is a 1U rack server with dual Intel Xeon processors and up to 768 GB RAM, making it more than capable of running multiple chess engines and web services…  - [Chess Broadcasting Guide to Setting Up TLCV on a Linux VPS](https://ijccrl.com/chess-broadcasting-guide-to-setting-up-tlcv-on-a-linux-vps/): Introduction to Chess Broadcasting Infrastructure In today’s digital chess landscape, real-time broadcasting has revolutionised how enthusiasts engage with tournaments. At the core of this transformation lies the powerful combination of Virtual Private Servers (VPS), Node.js, and specialised chess tools like Tom’s Live Chess Viewer (TLCV). For organisers seeking professional streaming capabilities without enterprise costs, implementing TLCV on a Linux VPS offers unprecedented flexibility. This guide demystifies the entire process—from server selection to tournament automation—using cutechess-cli for robust engine battles. Whether broadcasting local club matches or international grandmaster clashes, this solution transforms any Linux environment into a chess broadcasting powerhouse. A Virtual…  - [Automatic Installation of Node.js on a Linux VPS](https://ijccrl.com/como-instalar-node-js-en-vps-con-linux/): Introduction Node.js Node.js has become an indispensable component in modern web development, powering everything from simple command-line tools to large-scale enterprise applications. At its core, Node.js is a cross-platform, open-source JavaScript runtime environment that executes JavaScript code outside of a web browser, utilising Google’s V8 engine and an event-driven, non-blocking I/O model to deliver high performance and efficiency (Wikipedia). Whether you are building real-time chat applications, RESTful APIs, or data-intensive microservices, Node.js provides the versatility and scalability required by today’s development teams. For many developers and organisations, deploying Node.js in a production environment involves using a Virtual Private Server (VPS). A…  - [Compiling the Ethereal Chess Engine SSSE3 Version](https://ijccrl.com/compiling-the-ethereal-chess-engine-ssse3-version/): Introduction Compiling a chess engine may sound daunting, especially for those without a programming background. However, with the right tools and a clear, step-by-step guide, even a complete beginner can compile the Ethereal chess engine on Windows using MinGW-w64. This tutorial covers every stage—from setting up your environment to running the SSSE3-optimised build. By following these instructions, you will: Let’s embark on this journey to bring the powerful Ethereal engine to your Windows machine. What Is the Ethereal Chess Engine? Ethereal is an open-source chess engine created by Andy Grant. It is known for its strong playing strength, modular design, and…  - [WordPress Theme for chess site](https://ijccrl.com/wordpress-theme-for-chess-site/): Chess site Based on your request, I’ll create a WordPress theme that mimics the Google Sites layout you provided. This theme will maintain the design and structure while making it compatible with WordPress. WordPress Theme chess site Features WordPress Theme Features: To implement this as a WordPress theme, you would need to: The theme uses a gold/beige color scheme that matches the original Google Sites design while providing a professional and modern layout suitable for a chess site rating. Jorge Ruiz Centelles Filólogo y amante de la antropología social africana - [How to Compile Obsidian Chess Engine](https://ijccrl.com/how-to-compile-obsidian-chess-engine/): Compile Obsidian A Step-by-Step Guide for Non-Programmers Introduction The Obsidian chess engine is a powerful open-source tool for chess analysis. This guide walks you through compiling Obsidian on Windows using Mingw64—no programming knowledge needed! Follow these steps to transform Obsidian’s source code into a ready-to-use .exe file. Prerequisites Step 1: Install Required Tools Git Mingw64 Verify Installation bashgit clone https://github.com/gab8192/Obsidian bashcd Obsidian bashgcc -o obsidian.exe bitboard.c board.c main.c movegen.c perft.c search.c uci.c util.c -O3 -flto bashobsidian.exe Obsidian v0.1 by gab8192uciok`` Typequit` to exit. Troubleshooting Using Obsidian in Chess GUIs Conclusion You’ve successfully compiled the Obsidian chess engine on Windows using Mingw64!…  - [Rename Stockfish to other name Using MinGW64](https://ijccrl.com/rename-stockfish-to-other-name-using-mingw64/): 1. Clone and Prepare the Code 2. Essential Code Modifications a. uci.cpp (UCI Identification): b. main.cpp (Startup Message): c. engine_info() (in uci.cpp): d. CMakeLists.txt (Project Root): 3. Compilation with MinGW64 (Windows) a. Install Dependencies in MSYS2: b. Compile: 4. Verify Changes a. Run the Binary: b. Check UCI Output: Additional Changes (Optional) To remove all traces of “Stockfish”: Note: This will change ALL instances of “Stockfish”, including comments. Use with caution. Troubleshooting Common Issues Final Result Complete! You now have a fully renamed chess engine compiled with MinGW64. Jorge Ruiz Centelles Filólogo y amante de la antropología social africana - [Compiling PlentyChess with Clang64 on Windows](https://ijccrl.com/compiling-plentychess-with-clang64-on-windows/): PlentyChess with Clang64 on Windows Introduction Compiling the source code of a chess engine like PlentyChess involves translating its C/C++ code into a native Windows executable that can run at full speed on your hardware. PlentyChess is a strong UCI chess engine that uses an efficiently updated neural network (NNUE) for evaluation. Building the engine from source allows you to apply optimisations specific to your CPU, embed the latest neural network weights, and ensure compatibility with your system. In this tutorial we describe in detail how to set up a fresh Windows 10/11 environment for Clang64 compilation, prepare the MSYS2 toolchain,…  - [Deep Junior Pioneer of Dynamic Computer Chess](https://ijccrl.com/deep-junior-in-computer-chess/): Deep Junior Computer chess engines today typically adhere to the Universal Chess Interface (UCI) standard – an open communication protocol that lets engines “talk” to graphical front-ends and GUIs. UCI was introduced in 2000 by Rudolf Huber and Stefan Meyer-Kahlen (creator of the Shredder engine), and quickly became widely adopted in chess software. In UCI, the heavy-lifting of search and evaluation is done by an engine (often called a “chess program”), while the user interface handles input, display, and features like opening books or tablebases. Today well over 300 engines support UCI, allowing strong engines to be plugged into various GUIs…  - [Generate a Windows Script to Automate Posts on WordPress](https://ijccrl.com/generate-a-windows-script-to-automate-posts-on-wordpress/): Introduction In modern web development, a script is a set of instructions written in a high‑level programming language that automate repetitive tasks, manipulate data, or orchestrate interactions between different systems. Unlike compiled applications, scripts are often interpreted at runtime, making them ideal for rapid development, easy modification, and system administration tasks. Automation scripts save time, reduce human error, and ensure consistency when performing complex or repetitive operations, such as publishing blog posts, managing user accounts, or synchronising content across multiple platforms. A typical automation script interacts with external services through APIs (Application Programming Interfaces). In the context of WordPress, the WordPress…  - [Running Your Own node‐TLCV on Windows](https://ijccrl.com/running-your-own-node%e2%80%90tlcv-on-windows/): Guide to Implementing node‐tlcv on Windows Introduction Tom’s Live Chess Viewer (TLCV) is a protocol and client–server ecosystem that allows enthusiasts and developers to transmit and visualise live chess games over the internet. Initially conceived by Tom McBurney as a PowerBASIC console application, TLCV listens to debug files generated by WinBoard or Arena, parses moves, and broadcasts them via UDP listeners known as “TLCV clients.” Its companion, Tom’s Live Chess Server (TLCS), runs on Windows and serves as the data source for these broadcasts. Node‐TLCV is a modern, server‐side reimplementation of the TLCV protocol written entirely in Node.js. It bridges the…  - [Creating a New UCI Chess Engine](https://ijccrl.com/creating-a-new-uci-chess-engine/): UCI Chess Engine Introduction The Universal Chess Interface (UCI) is a widely adopted, open communication protocol that enables chess engines to interact seamlessly with graphical user interfaces (GUIs). Conceived in November 2000 by Rudolf Huber and Stefan Meyer-Kahlen, UCI rapidly gained prominence as a simpler, more flexible alternative to the older XBoard/WinBoard protocol. Its core philosophy delegates certain responsibilities—such as managing opening books and handling tablebases—to the GUI, allowing engines to focus exclusively on position evaluation and move calculation. As a result, dozens of high-performance engines like Stockfish, Komodo, and Houdini have embraced UCI, offering users powerful analytical tools integrated into…  - [Guide to Implementing node tlcv for Chess Engine Tournament](https://ijccrl.com/guide-to-implementing-node-tlcv-for-chess-engine-tournament/): Comprehensive Guide to Implementing node-tlcv for Chess Engine Tournament Broadcasting on Windows and Hostinger Introduction: Understanding TLCS, Node.js, and node-tlcv Tom’s Live Chess Server (TLCS) constitutes a specialised protocol for broadcasting chess games in real-time, originally developed for the competitive computer chess community. This TCP-based system enables engines like Stockfish or Leela Chess Zero to transmit move data, game states, and analysis to spectators globally. The protocol’s lightweight design prioritises low-latency communication essential for high-level engine tournaments where millisecond precision matters. Node.js revolutionises server-side development through its event-driven, non-blocking I/O model. Built upon Chrome’s V8 JavaScript engine, it allows developers to…  - [The King's Gambit in Computer Chess: Resurrection of Romanticism](https://ijccrl.com/the-kings-gambit-in-computer-chess-resurrection-of-romanticism/): The King’s Gambit in Computer Chess Introduction: Understanding the King’s Gambit The King’s Gambit stands as one of chess’s most storied and romantic openings, beginning with the moves 1.e4 e5 2.f4. This aggressive declaration sees White sacrifice a kingside pawn to seize central dominance, accelerate development, and launch an immediate assault against Black’s position. Historically emblematic of 19th-century “romantic chess” – where tactical fireworks overshadowed positional caution – it featured prominently in legendary games like Anderssen’s “Immortal Game” (1851) . The gambit’s core strategic foundation rests on three pillars: Traditional theory divides Black’s responses into: Despite its historical prominence, the gambit…  - [The Queen's Gambit Accepted in Computer Chess](https://ijccrl.com/the-queens-gambit-accepted-in-computer-chess/): Introduction The Queen’s Gambit Accepted (QGA) stands as one of chess’s most theoretically profound and strategically rich openings. Arising after 1.d4 d5 2.c4 dxc4, this gambit sees Black temporarily seize a pawn while yielding central control. Unlike speculative gambits, the QGA is renowned for its positional soundness, offering Black dynamic counterplay through rapid development and central challenges like …e5 or …c5 . World Champions including Kasparov, Karpov, Anand, and Topalov have employed it, testifying to its resilience against elite preparation . In computer chess, the QGA has evolved beyond human intuition into a proving ground for algorithmic sophistication. Engines like Stockfish…  - [Differences between Fritz 19 and Fritz 20](https://ijccrl.com/differences-between-fritz-19-and-fritz-20/): Fritz 19 and Fritz 20 Introduction on Fritz 19 and Fritz 20 In the realm of computer chess, a Graphical User Interface (GUI) serves as the essential bridge between a human player and the underlying chess engine. A chess GUI provides visual boards, move input methods, analysis windows, training modules, and myriad configuration options, transforming raw engine calculations into an interactive, user-friendly experience. Without a robust, intuitive GUI, even the strongest chess engine remains inaccessible to the average user, obscured behind cryptic commands and indecipherable output. A well-designed GUI not only presents game states and analysis clearly but also integrates training…  - [How to Install the Syzygy Tablebases on Fritz 20](https://ijccrl.com/how-to-install-the-syzygy-tablebases-on-fritz-20/): Introduction Tablebases on Fritz 20 In the realm of computer chess, the study and mastery of endgames is elevated by the use of endgame tablebases—precomputed databases that contain perfect play information for positions with a limited number of pieces on the board. Among the most widely adopted formats is the Syzygy tablebase, a compact and efficient six-piece database that provides both win/draw/loss (WDL) and depth-to-zeroing-move (DTZ) metrics. Originally developed by Ronald de Man in 2013, Syzygy revolutionised endgame analysis by drastically reducing storage requirements compared to its predecessors while maintaining exhaustive coverage of every legal arrangement of up to six pieces…  - [ChessBase 18 Ultimate Guide for Beginners and Advanced Players](https://ijccrl.com/chessbase-18-ultimate-guide-for-beginners-and-advanced-players/): ChessBase 18 Ultimate Guide Introduction ChessBase 18 isn’t just software; it’s the undisputed industry standard, the digital command centre for the modern chess player. Developed by the German company ChessBase GmbH, it represents over three decades of refinement in chess database management, analysis, and training. At its core, ChessBase 18 is a sophisticated relational database system meticulously designed to store, organise, retrieve, and analyse millions of chess games. Think of it as a vast, intelligent library combined with a powerful analytical laboratory, all tailored for the royal game. Whether you’re a novice taking your first steps beyond casual play or a…  - [Creating a Cross-Platform App to Combine .bin Files](https://ijccrl.com/creating-a-cross-platform-app-to-combine-bin-files/): Creating a Cross-Platform App to Combine .bin Files Figure: A visual representation of binary data (zeros and ones) illustrating the concept of a binary file. A binary file is any computer file whose contents are not plain text, but rather stored as raw binary data (bytes). In other words, a binary file contains sequences of bytes (groups of eight bits) that may represent anything from compiled program code to images or sound. The file extension “.bin” itself stands for “binary”, signalling that the content consists of bit patterns with little or no human-readable text. For example, CD/DVD images, firmware updates, or…  - [Comprehensive Guide to Building a Chess GUI](https://ijccrl.com/comprehensive-guide-to-building-a-chess-gui/): Comprehensive Guide to Building a Chess GUI: From Concept to Executable Understanding Graphical User Interfaces (GUIs) A Graphical User Interface (GUI) represents the visual layer through which users interact with software applications. Unlike command-line interfaces requiring text-based commands, GUIs employ visual elements like icons, buttons, and windows to facilitate intuitive interaction. In chess software, a GUI transforms abstract game states into visually recognisable boards with pieces, enabling moves via drag-and-drop actions rather than coordinate notation. The core value proposition lies in enhancing accessibility – players can focus on strategy rather than deciphering algebraic notation or engine protocols. Modern chess GUIs implement…  - [CHESS ENGINE GUI — THE PARALLEL WORLD EXPERIENCE](https://ijccrl.com/chess-engine-gui-the-parallel-world-experience/): ♟️ CHESS ENGINE GUI — THE PARALLEL WORLD EXPERIENCE ♟️ A full-spectrum interface for neural chess exploration and play 🌌 Welcome, Grandmaster of Realms As you open the portal, a soft pulse lights up the screen. Binary threads hum quietly beneath a brushed-metal interface. The GUI engine comes alive, its circuitry warm with anticipation. A voice speaks, somewhere between machine and memory: “You’ve arrived. The game awaits you. But first… choose your destiny.” 🧭 MAIN MENU Please select one of the following entry points: ⬇️ User Input: A 🔧 Engaging Parallel World Mode…🧠 Loading UCI Engine: DragonFury-NNUE_v9.avx2🧩 Network Loaded: nn-9be26e1fd0df.nnue⚙️ Parameters:…  - [Syzygy Endgame impact on Chess Engine Performance](https://ijccrl.com/syzygy-endgame-impact-on-chess-engine-performance/): Syzygy Endgame Installation, Hardware Requirements, and Impact on Chess Engine Performance Introduction to Syzygy Endgame Tablebases Syzygy Endgame Tablebases (ETBs) represent a monumental achievement in computer chess, enabling perfect play in endgames with a limited number of pieces remaining on the board. Developed primarily by Ronald de Man, these tablebases provide a precomputed, exhaustive solution for every possible position within specific piece configurations. Unlike chess engines that rely on heuristic evaluation and deep searching, Syzygy bases offer definitive knowledge: they categorically state whether a position is a win, loss, or draw for the player to move, and precisely how many moves…  - [The Ruy Lopez Opening – Moeller System in Computer Chess](https://ijccrl.com/the-ruy-lopez-opening-moeller-system-in-computer-chess/): Introduction to the Ruy Lopez Opening The Ruy Lopez, also known as the Spanish Opening, is one of the most revered and enduring chess openings in history. It emerges after the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5 and is named after the 16th-century Spanish priest Ruy López de Segura, who first analysed this sequence in his 1561 treatise Libro del Ajedrez. This opening has played a pivotal role in both classical and modern chess theory, becoming a central fixture in countless world championship matches and elite tournaments. It is deeply rooted in the strategic battle for the centre and long-term positional…  - [Sicilian Defence The Paulsen Variation](https://ijccrl.com/sicilian-defence-the-paulsen-variation/): Sicilian Defence Paulsen Variation Introduction: What Is the Sicilian Defence? The Sicilian Defence is one of the most popular and best‑scoring responses to 1.e4. Initiated by 1.e4 c5, it immediately contests White’s attempt to dominate the centre, creating an asymmetrical pawn structure that often yields rich, dynamic play ( en.wikipedia.org). Originating as early as the Italian treatise of Pietro Carrera in 1617 and later championed by Louis Paulsen in the 1870s, it has evolved into a complex set of systems—including Najdorf, Dragon, Scheveningen, and the Paulsen Variation (also known as the Kan Variation) (es.wikipedia.org). This introduction establishes the broader context of…  - [A Detailed Comparison of SCID and SCID vs PC](https://ijccrl.com/a-detailed-comparison-of-scid-and-scid-vs-pc/): Introduction In the world of chess analysis and database management, graphical user interfaces (GUIs) play a vital role. Among the various GUIs available, SCID (Shane’s Chess Information Database) and SCID vs PC are two of the most widely used by enthusiasts and professionals alike. These platforms offer robust tools for managing large databases of chess games, integrating engines, creating repertoires, and much more. Despite their similarities, SCID and SCID vs PC have diverged in features, interface design, and performance, making a detailed comparison essential for users seeking to select the most appropriate tool for their needs. This comprehensive tutorial aims to…  - [Subscribers on YouTube for a Computer Chess](https://ijccrl.com/subscribers-on-youtube-for-a-computer-chess/): Subscribers on YouTube for a Computer Chess: A Data-Driven Masterplan Introduction The realm of computer chess represents a fascinating intersection of artificial intelligence, classical strategy, and technological evolution. For content creators specialising in this niche, YouTube offers unparalleled reach—yet subscriber growth demands meticulous strategy. Unlike broader gaming channels, computer chess appeals to a highly specialised audience: chess enthusiasts fascinated by engine development, programmers, hardware tinkerers, and competitive analysts. According to YouTube’s internal analytics, niche educational content enjoys 40% higher audience retention rates than general entertainment, making it fertile ground for dedicated creators. Nevertheless, channels like IJCCRL (currently at 76 subscribers) exemplify…  - [The Best GUI Chess for Analysing and Playing](https://ijccrl.com/the-best-guis-for-analysing-and-playing-chess/): The Best GUI Chess Introduction: What is a GUI and Why It Matters in Chess A Graphical User Interface (GUI) is a form of user interface that allows users to interact with electronic devices through graphical icons and visual indicators, rather than text-based interfaces, typed command labels, or text navigation. The concept of the GUI was pioneered at Xerox PARC in the 1970s and brought into popular computing with Apple’s Macintosh and Microsoft Windows platforms. In essence, a GUI enables more intuitive interaction with software applications, particularly for users who may not be comfortable using command-line prompts. In the context of…  - [Cloud Engines on Playchess](https://ijccrl.com/cloud-engines-on-playchess/): Using Cloud Chess Engines in Playchess Introduction: What Is Playchess and the Engine Room Playchess is ChessBase official online chess platform, combining live games, databases, commentary, and analysis on a unified, browser‑based and desktop interface (help.chessbase.com). Among its wealth of features, the Engine Room—a place where players can engage with engines for analysis, training, or automated matches—is arguably one of the most powerful tools available to modern chess enthusiasts. What Is Playchess? The Engine Room: A Specialist Environment The Engine Room is a dedicated space on the Playchess server where users can: Central to this space is the ability to use…  - [How to Use a Bot on Lichess with Banksia GUI](https://ijccrl.com/how-to-use-a-bot-on-lichess-with-banksia-gui/): Bot on Lichess with Banksia GUI Introduction Automated chess bots have transformed the landscape of online play and engine analysis. Lichess.org, a premier open-source chess platform, offers robust support for chess bots via its API. When coupled with a powerful graphical user interface like Banksia GUI, these bots become even more capable and versatile. This tutorial provides a comprehensive, step-by-step guide for deploying and managing a chess bot on Lichess using Banksia GUI under a Windows environment. This article is aimed at advanced users, hobbyists, and developers who want to integrate a strong chess engine with Lichess. Whether you’re interested in…  - [How to Gain Subscribers on a Computer Chess YouTube Channel](https://ijccrl.com/how-to-gain-subscribers-on-a-computer-chess-youtube-channel/): Computer Chess YouTube Channel Introduction: The Intersection of Chess Engines and Digital Audiences Computer chess represents a captivating fusion of strategic complexity and technological sophistication. With the rapid growth of digital media and online video platforms, enthusiasts now have unprecedented opportunities to explore and share this niche. YouTube, as the world’s second most-visited website, offers a powerful stage for content creators in the realm of chess computing. However, building a subscriber base in this specialised domain demands more than passion — it requires meticulous planning, understanding of platform mechanics, and a data-driven content strategy. According to Statista (2024), over 2.7 billion…  - [How to Create a Lichess Bot with BotLi Guide](https://ijccrl.com/how-to-create-a-lichess-bot-with-botli-guide/): How to Create a Lichess Bot with BotLi Guide How to Create a Lichess Bot Using BotLi(GitHub) In the realm of online chess, automation has become an intriguing frontier. Lichess.org, a leading free and open-source chess platform, offers an API that allows developers to create bots capable of playing games autonomously. This guide provides a comprehensive walkthrough on setting up a Lichess bot using BotLi, a Python-based tool designed for this purpose.(talkchess.com) Introduction to Lichess Bots A Lichess bot is an automated account that can play chess games on Lichess.org without human intervention. These bots interact with the Lichess API, enabling…  - [Hash Memory in a UCI Chess Engine](https://ijccrl.com/hash-memory-in-a-uci-chess-engine/): Hash Memory in a UCI Chess Engine Using Seven-Piece Syzygy Endgames Here is the full article draft based on your specifications: Hash Memory in a UCI Chess Engine Using Seven-Piece Syzygy Endgames Introduction: Understanding Hash Memory in Chess Engines In the realm of computer chess, one of the cornerstones of a powerful engine’s performance is its effective use of hash memory. This component, often overlooked by casual users, plays a critical role in how an engine like Stockfish evaluates positions, makes decisions, and improves its efficiency. As chess engines evolve to leverage massive databases like Syzygy endgame tablebases, the interaction between…  - [Plugin to Livestream Chess Tournaments with Cutechess-cli](https://ijccrl.com/plugin-to-livestream-chess-tournaments-with-cutechess-cli/): 🎯 Live Chess Tournament Broadcasting Plugin for WordPress Using Cutechess-CLI 📌 Overview This article outlines the creation and installation of a custom WordPress plugin to livestream chess tournaments played via Cutechess CLI. The plugin will be installed on a typical Hostinger Business Web Hosting environment for the website https://ijccrl.com. This enables administrators to show live updates of chess games in PGN or FEN format directly on their WordPress site. 🔧 Requirements ✅ Server Requirements ✅ Tools Required 🧩 Plugin Features 🗂 Plugin File Structure 🔨 Plugin Code: live-chess-broadcast.php 🧠 Example: Cutechess Tournament Command Store PGN in /wp-content/uploads/livegame.pgn and fetch using PHP.…  - [Seven-Piece Tablebases on Chess Engine Performance](https://ijccrl.com/seven-piece-tablebases-on-chess-engine-performance/): Seven-Piece Tablebases on Chess Engine Performance Introduction In the realm of computer chess, where precision and optimality govern the outcome of millions of moves, endgame tablebases stand as pillars of absolute truth. These tablebases are precomputed databases that contain perfect information about chess endgames, listing every possible legal position within a defined set of pieces and providing the game-theoretical value of that position: win, loss, or draw, and the exact sequence to achieve that result under perfect play. Among the most renowned and utilised in the modern chess ecosystem are the Syzygy tablebases. The Syzygy endgame tablebases, developed by Ronald de…  - [Training Chess Engine Experience Files: Phase LS01](https://ijccrl.com/training-chess-engine-experience-files-phase-ls01/): Training Experience Files: Phase LS01 Introduction In the realm of computer chess, the performance of a chess engine is not solely determined by its core algorithms or evaluation functions. An often-overlooked component that significantly influences an engine’s strength is its experience file. These files, which store information about previously encountered positions and evaluations, enable engines to make more informed decisions based on historical data. The initial phase of training these experience files, commonly referred to as LS01, is crucial in laying the foundation for an engine’s learning process. This article aims to provide a comprehensive guide to setting up the environment…  - [Use of Chess Programs in ICCF](https://ijccrl.com/use-of-chess-programs-in-iccf/): Use of Chess Programs in ICCF Chess Programs in ICCF. The International Correspondence Chess Federation (ICCF) is the global governing body for correspondence chess—chess games played remotely, traditionally by mail and increasingly via online servers. Founded in 1951, the ICCF’s mission is to promote and regulate correspondence chess events across national federations, ensuring fair play, standardized rules, and the awarding of titles and ratings comparable to over-the-board chess. Correspondence chess offers players extended thinking time, often allowing days per move, which encourages deeper strategic analysis and makes the use of dedicated chess software a practical necessity for contemporary competitors. Correspondence chess…  - [ECO Encyclopedia of Chess Openings](https://ijccrl.com/eco-encyclopedia-of-chess-openings/): Introduction: Understanding the Encyclopedia of Chess Openings (ECO) In the realm of chess, the opening phase is critical, setting the stage for the middlegame and endgame. To navigate this phase effectively, players and theorists have developed extensive literature, among which the Encyclopaedia of Chess Openings (ECO) stands as a cornerstone. The ECO is a comprehensive reference work that systematically categorises chess openings using a unique alphanumeric code system. This system divides openings into five main categories labeled A through E, each containing 100 subcategories, resulting in 500 distinct codes. For example, the Sicilian Defence is classified under codes B20–B99, while the…  - [Sicilian Najdorf Variation in Computer Chess](https://ijccrl.com/sicilian-najdorf-variation-in-computer-chess/): Najdorf Variation The Sicilian Defence is one of the most popular and dynamic responses to 1.e4, branching into a wide array of systems that have been deeply analysed over centuries. Within this family of openings, the Najdorf Variation—characterised by the moves 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6—stands out as a cornerstone of modern opening repertoires. Often dubbed the “Rolls-Royce” or “Cadillac” of chess openings, the Najdorf’s blend of strategic flexibility and tactical complexity has attracted generals of the board such as Bobby Fischer and Garry Kasparov . In the realm of computer chess, the Najdorf Variation occupies…  - [French Defense Nímzovitch variation in Chesscomputer](https://ijccrl.com/french-defense-nimzovitch-variation-in-chesscomputer/): French Defense Nímzovitch The French Defense, a classical opening in chess, has long been one of the most popular and reliable strategies for black players, particularly against 1.e4. The Nímzovitch variation is one of the many subvariations within this broader defense, celebrated for its unique approach to countering white’s early moves. To understand the significance of the Nímzovitch variation, one must first explore the core principles of the French Defense itself, its key strategic ideas, and the nuances that define the Nímzovitch subvariation. The French Defense, initially developed as a response to 1.e4, revolves around the concept of building a solid,…  - [The Sokolsky Opening in Computer Chess](https://ijccrl.com/the-sokolsky-opening-in-computer-chess/): The Sokolsky Opening in Computer Chess Introduction: Understanding the Sokolsky Opening The Sokolsky Opening, also known as the Orangutan or Polish Opening, is a unique and unconventional chess opening that begins with the move 1.b4. This opening deviates from the more traditional central pawn advances such as 1.e4 or 1.d4, aiming instead to control the center from the flanks. Named after the Soviet Grandmaster Alexey Sokolsky, who extensively analyzed and promoted this opening, the Sokolsky has intrigued chess enthusiasts and professionals alike for its unorthodox approach and strategic depth. Historical Context The origins of the Sokolsky Opening can be traced back…  - [The Ruy Lopez Closed Variation in Computer Chess](https://ijccrl.com/the-ruy-lopez-closed-variation-in-computer-chess/): The Ruy Lopez Closed Variation in Computer Chess Introduction The Ruy Lopez, also known as the Spanish Opening, is one of the most esteemed and extensively analysed openings in chess history. Named after the 16th-century Spanish priest Ruy López de Segura, who authored one of the earliest comprehensive works on chess, this opening has stood the test of time, remaining a staple in both classical and modern play. Its enduring popularity is a testament to its strategic depth and flexibility. The opening begins with the moves 1.e4 e5 2.Nf3 Nc6 3.Bb5, where White aims to apply pressure on Black’s central e5…  - [Lucas Chess GUI for Chess Engines](https://ijccrl.com/lucas-chess-gui-for-chess-engines/): Lucas Chess GUI Introduction Lucas Chess is an open-source graphical user interface (GUI) designed to facilitate play, training and analysis with a wide variety of chess engines. Whether you are a beginner seeking tactical puzzles or a seasoned player organising engine tournaments, LucasChess provides an intuitive environment for all levels. This section will guide you through the download and installation process on both Windows and Linux platforms, ensuring a smooth setup. Downloading Lucas Chess Installing on Windows Installing on Linux Post-Installation Steps With LucasChess installed, you are now ready to explore its extensive training modules, analysis tools and tournament organisers. History…  - [The Role of TCEC in Computer Chess](https://ijccrl.com/the-role-of-tcec-in-computer-chess/): TCEC in Computer Chess Introduction The Role of TCEC in Computer Chess. The Top Chess Engine Championship (TCEC) has, since its inception in 2010, become the foremost stage upon which the world’s strongest chess engines compete. Unlike human tournaments, TCEC’s matches are played strictly between computer programs—referred to as engines—under uniform hardware conditions, identical opening books and time controls. This ensures that performances reflect pure algorithmic strength rather than differences in resources or settings. Broadcast live with rich commentary and a high‐quality graphical interface, TCEC offers spectators an opportunity to witness ultra‐deep analysis and novel strategic ideas in long time‐control games,…  - [ChessBase in Computer Chess](https://ijccrl.com/chessbase-in-computer-chess/): ChessBase The world of computer chess has been profoundly shaped by a single German company whose name has become synonymous with professional preparation and comprehensive game analysis: ChessBase. Since its inception in the mid-1980s, ChessBase has revolutionised how players—from world champions to club enthusiasts—study and engage with the royal game. This article delves into the company’s origins, traces its evolution in software and hardware, examines its flagship engines and online services, and presents a detailed chronology of its most significant milestones. We will also explore ChessBase’s extensive range of publications and training materials, assess its broader influence on human chess study,…  - [Obsidian Evolution and Development](https://ijccrl.com/obsidian-evolution-and-development/): Obsidian Introduction In the fast-paced world of computer chess, innovation and consistent improvement are the keys to staying competitive. Over the past few years, one engine has quietly climbed the ranks to challenge established titans: Obsidian. Originally conceived in April 2023 by developer gabe (GitHub user gab8192), Obsidian blends classical search techniques with modern neural-network evaluation to deliver an exceptional playing strength on par with — and in some cases surpassing — top engines like Stockfish and Torch. This article explores the evolution and development of Obsidian, from the author’s earliest forays into chess programming through the creation of this UCI…  - [Leela Chess Zero for Peak Performance](https://ijccrl.com/leela-chess-zero-for-peak-performance/): Leela Chess Zero for Peak Performance Introduction The landscape of computer chess has been irrevocably transformed by the emergence of neural-network-based engines, and at the forefront of this revolution stands Leela Chess Zero (Lc0). Born as an open-source implementation inspired by Google’s AlphaZero, Leela Chess Zero harnesses the power of deep learning and Monte Carlo Tree Search (MCTS) to evaluate positions and select moves. Unlike traditional engines such as Stockfish, which rely extensively on brute-force search and handcrafted evaluation functions, Lc0 integrates a trained neural network to guide its search, leading to a fundamentally different approach to chess-playing strength and style.…  - [History and List of Chess Engines](https://ijccrl.com/history-and-list-of-chess-engines/): History Chess Engines Introduction History Chess Engines. Chess engines, or modules, are specialised computer programmes designed to analyse chess positions and determine optimal moves. Since their inception, they have transformed the way players train, study openings, and even contest world championships. What began as rudimentary theoretical constructs and mechanical automatons has evolved into highly sophisticated software harnessing advanced algorithms, vast opening books, endgame tablebases, and, more recently, neural networks. This progression has not only accelerated the development of computer science and artificial intelligence but has also reshaped the cultural landscape of chess itself, making the distinction between human intuition and machine…  - [Which White Opening the Best Results for Stockfish?](https://ijccrl.com/which-white-opening-the-best-results-for-stockfish/): Opening for Stockfish Introduction In the realm of computer chess, Stockfish stands as one of the most formidable engines ever developed. Its unparalleled search algorithms, combined with the Neural Network Unified Evaluation (NNUE) enhancement, enable it to navigate the vast complexities of chess positions with astonishing precision. However, even the strongest engine’s performance can hinge critically on the opening it encounters. Certain openings lead to dynamic imbalances that favour tactical fireworks, while others settle into quiet manoeuvring that exploits Stockfish’s deep positional understanding. This article examines which White openings yield the best results for Stockfish, drawing on multiple authoritative sources: By…  - [How to Create Chess Engine Tournaments in cutechess-cli](https://ijccrl.com/how-to-create-chess-engine-tournaments-in-cutechess-cli/): Chess Engine Tournaments in cutechess-cli Introduction Creating and managing automated chess engine tournaments is a vital skill for developers, researchers, and enthusiasts aiming to evaluate engine strength, tune parameters, or simply enjoy high-quality engine-versus-engine play. The cutechess-cli tool, part of the Cute Chess suite, offers a robust command-line interface for orchestrating complex tournaments with minimal manual intervention. This tutorial guides you through every step—from installing the tool on both Windows and Linux to configuring tournament formats, engines, time controls, managing the engines.json file, and automating your tournaments with batch scripts. Cute Chess comprises three main components: Since its inception in 2008,…  - [Measuring the strength of chess engines](https://ijccrl.com/measuring-the-strength-of-chess-engines/): strength of chess engines Measuring the strength of chess engines is a pivotal endeavour in both academic research and practical engine development. With the rapid pace at which engine evaluation and hardware advance, precise and reproducible testing methods are essential to benchmark improvements, compare disparate architectures, and guide future innovation. Two prominent approaches stand out in the modern landscape: the Computer Chess Rating Lists (CCRL), a long‑established, community‑driven framework for large‑scale engine versus engine testing, and the Unbalanced Human Openings (UHO) suite, pioneered by Stefan Pohl, which emphasises human‑played, filtered opening positions coupled with advanced scoring methods to enhance Elo reliability.…  - [Working with Transpositions in CTG Opening Books](https://ijccrl.com/working-with-transpositions-in-ctg-opening-books/): Transpositions in CTG Opening Books Introduction: What Are CTG Books? In the world of professional and high-performance chess, opening preparation and study are fundamental elements for success. Chess players and coaches use various tools to improve their knowledge and performance, and one of the most powerful and sophisticated tools is the use of opening books in CTG format. But what exactly are these CTG books? CTG books, or opening databases in ChessBase format, are digital collections of positions and opening moves used in chess software such as ChessBase and Fritz. This format, developed by ChessBase, allows players to store and organize…  - [Compiling Code Cloned from GitHub on Windows 10 Pro](https://ijccrl.com/compiling-code-cloned-from-github-on-windows-10-pro/): Introduction to GitHub and the Importance of Cloning Repositories In the world of software development, GitHub has established itself as an essential platform for managing code projects, sharing work with the community, and collaborating efficiently in development environments. Since its creation in 2008, GitHub has revolutionized the way developers handle version control and teamwork. The platform allows users to host their code repositories, whether public or private, and offers advanced tools for tracking changes, reviewing code, and continuous integration. GitHub is built on Git, a distributed version control system created by Linus Torvalds in 2005. Git enables developers to track changes…  - [How to Install the OpenBench Framework](https://ijccrl.com/how-to-install-the-openbench-framework/): OpenBench Framework In the fascinating world of chess engine development, the need for effective tools to test and evaluate changes in these engines is crucial. OpenBench stands out as one of the most relevant platforms for this purpose. This article will provide a comprehensive guide on how to install and configure the OpenBench framework in a Windows 10 Pro environment and how to use it to perform various types of tests on chess engines. Each step will be accompanied by clear and detailed explanations so that any developer, regardless of experience level, can follow along and take advantage of this powerful…  - [How to Create an Experience File in a UCI Chess Engine](https://ijccrl.com/how-to-create-an-experience-file-in-a-uci-chess-engine/): Experience File in a UCI Chess Engine Creating an experience file for a UCI chess engine is an advanced technique that allows the engine to learn from past games and improve its decision-making process. In modern chess programming, experience files serve as repositories of historical data including moves, evaluations, and outcomes of previous games. By utilizing these files, engines can adjust their strategies, learn from their mistakes, and optimize their performance in subsequent games. This article is based on the reference guide available at deeds.mynetgear.com, and it covers the sections on Experiments, Experience Files, Learning Quiz, and Learning Sessions. In addition…  - [How to Create Syzygy Seven-Piece Tablebases](https://ijccrl.com/how-to-create-syzygy-seven-piece-tablebases/): Syzygy Seven-Piece Tablebases Introduction: Understanding Syzygy Tablebases Syzygy tablebases are an essential tool in modern chess engines, allowing for perfect play in endgame scenarios. These databases store precomputed results for all possible positions with a given number of pieces, enabling engines to determine the optimal move instantly. Developed by Ronald de Man, Syzygy tablebases are renowned for their efficiency and compression, making them superior to older tablebase formats like Nalimov or Lomonosov. The importance of these tablebases lies in their ability to provide precise evaluations for endgames, improving the strength of chess engines and aiding players in understanding critical endgame positions.…  - [How make a Chess Engine Tournament in Arena GUI](https://ijccrl.com/how-make-a-chess-engine-tournament-in-arena-gui/): Chess Engine Tournament in Arena GUI Introduction to Arena GUI Arena GUI is a popular graphical user interface (GUI) for chess engines that has gained a prominent place in the computer chess community. Developed by Martin Blume, Arena provides a user-friendly and powerful environment for running and analyzing chess games, whether between chess engines, humans, or a combination of both. Through its intuitive design and numerous functionalities, Arena has made it easier for players and programmers to manage chess engines and organize tournaments. Main Features of Arena GUI Arena GUI offers a variety of features that make it ideal for managing…  - [App to Import PGN Databases into Opening Books in .bin Format](https://ijccrl.com/app-to-import-pgn-databases-into-opening-books-in-bin-format/): Introduction Chess, known as the “game of kings,” has for centuries been a manifestation of strategy, critical thinking, and art. With the advent of technology, chess study has evolved tremendously. One of the most valuable tools for players and coaches is the chess game database in PGN (Portable Game Notation) format. PGN is a standard format for recording chess games, allowing users to easily save and share games. For more information about PGN, you can check this source. What is PGN? PGN (Portable Game Notation) is a file format that allows for the efficient and standardized writing, storage, and reading of…  - [App to Convert Chess PGN Database into Graphs](https://ijccrl.com/app-to-convert-chess-pgn-database-into-graphs/): App to Convert Chess PGN Database into Graphs Introduction Chess is one of the oldest and most revered games in the world, with a rich history spanning centuries and cultures. Over the years, the way players analyze and study chess has evolved significantly, and one of the most important tools in this process has been the PGN chess database. But what exactly is a PGN chess database, and how can it be used to generate graphs that facilitate game analysis and trend identification? Portable Game Notation (PGN) is a standard text format used to record and share chess games. This format…  - [WordPress Plugin for Live Game Streaming](https://ijccrl.com/wordpress-plugin-for-live-game-streaming/): Plugins are pieces of software that integrate with WordPress to extend and enhance its functionalities. They allow specific features to be added to a website in a simple and customized way. In this article, we will focus on developing a WordPress plugin that facilitates live game streaming, such as chess tournaments played with the Fritz interface. Introduction to WordPress Plugins Plugins are fundamental components for expanding WordPress capabilities. They can be small tools that add a specific function or complex applications that completely transform a website. The versatility of plugins allows users to adapt their sites to their particular needs without…  - [Rating List Chess Engines An Analysis of Performance](https://ijccrl.com/rating-list-chess-engines-an-analysis-of-performance/): Rating List Chess Engines 1. Introduction Chess engines have long been a subject of research and fascination within the artificial intelligence and game theory communities. The rapid improvement in algorithmic efficiency and computational power has transformed engines into formidable opponents. Rating lists, such as those maintained by CCRL (Computer Chess Rating Lists) [1], provide a standardized method for evaluating the strength of these engines. In contrast, encyclopedic sources such as Wikipedia [2] offer a historical overview and technical background, including algorithmic improvements and machine learning techniques that have driven engine development. 2. Methodology of Rating Lists 2.1 Data Collection and Testing…  - [Revolution 4.0 211225](https://ijccrl.com/revolution-4-0-211225/): Summary Download - [LesChats 191225 bin book](https://ijccrl.com/leschats-191225-bin-book/): Summary Download - [Wordfish 3.60](https://ijccrl.com/wordfish-3-60-181225/): Summary Download - [Africaata ctg update 151225](https://ijccrl.com/africaata-ctg-update-151225/): Summary - [Revolution 3.90 151225](https://ijccrl.com/revolution-3-90-151225/): Summary Download - [Pullfish 2.80 141225](https://ijccrl.com/pullfish-2-80-141225/): Summary - [Deepalienist 2.40 141225](https://ijccrl.com/deepalienist-2-40-141225/): Summary Added low-time safety handling in TimeManagement, reserving a fixed buffer and tapering optimal/maximum allocation when time is scarce, especially without movestogo. Introduced a soft time trigger in check_time to increase monitoring frequency and allow earlier stopping when approaching the time limit. Added an SSE4.1+POPCNT-specific prefetch override and tuned pipeline flags (-march=nehalem, -mtune=haswell, alignment, and prefetch loop hints) so x86-64-sse41-popcnt builds can be reproducibly targeted and benchmarked. Introduced dedicated make targets for the SSE4.1 profile build, single-run net bench, and automated prefetch-on/off comparisons, capturing results into reproducible artifacts for analysis. Documented the new workflow and recorded prefetch-on/off benchmark deltas (458,903 vs.…  - [Akan bin book 131225](https://ijccrl.com/akan-bin-book-131225/): Akan bin book - [Africaata bin book 131225](https://ijccrl.com/africaata-bin-book-131225/) - [IJCCRL LIVE ARENA OFICIAL GUIDE](https://ijccrl.com/ijccrl-live-arena-oficial-guide/): IJCCRL LIVE ARENA Broadcasting Computer-Chess Games with TLCS + WinBoard + Node-TLCV + Nginx (HTTPS) Overview IJCCRL LIVE ARENA is a lightweight, production-ready pipeline for broadcasting engine games in real time using a classic WinBoard/TLCS backend and a modern web viewer served by a Node.js relay and protected behind Nginx + Let’s Encrypt. This system is designed for: 1) Architecture High-level diagram What each component does 2) Known Behaviour (Important) Why moves may look “delayed” compared to engine GUIs WinBoard/TLCS does not behave like modern PGN push services. In practice: This is a protocol/producer characteristic, not a defect in Nginx or…  - [New update africaata database .pgn 2025](https://ijccrl.com/new-update-africaata-database-pgn-2025/): 1️⃣ GitHub Releases Version (Professional & Concise) Release: Database Update 12.12.25 This release introduces a major quality upgrade to the game database through advanced filtering and long-term curation policies. Key Improvements Summary Built using stable, high-performance UCI engines developed by Jorge Ruiz in collaboration with ChatGPT, this database provides a reliable and clean foundation for opening books, theoretical preparation, and professional engine analysis. 2️⃣ Short Newsletter / Popup Version (Minimal & Persuasive) Database Update – 12.12.25 ✔ Corrupted PGNs removed using Khalid Omar’s PGN Tool✔ Bullet games eliminated — only serious Blitz games remain✔ Trojan and poisoned moves fully excluded✔ Games…  - [En Croissant Guide to a Modern Chess GUI](https://ijccrl.com/en-croissant-guide-to-a-modern-chess-gui/): En Croissant: An Advanced Guide to a Modern Chess GUI for Windows & Linux En Croissant is a relatively young but very ambitious chess GUI: a cross-platform desktop toolkit built with React and Rust/Tauri, designed to feel as clean as a web app while offering the depth of a serious database and analysis suite.(En Croissant) It lets you: In this tutorial we’ll go well beyond the basics. You’ll learn: 1. Installing En Croissant 1.1 Download options and system requirements The official download page offers builds for Linux, Windows, and macOS, with the current release at the time of writing being v0.12.1.(En…  - [HypnosIjccrl-071225](https://ijccrl.com/hypnosijccrl-071225/): Summary Settings Quick recommendations for the most common controls. Adjust the values in your UCI GUI according to each time profile: Jorge Ruiz Filólogo y amante de la antropología social africana - [Deepalienist-061225](https://ijccrl.com/deepalienist-061225/): Summary - [Revolution-3.80-021225](https://ijccrl.com/revolution-3-80-021225/): Summary Download Revolution-3.80-021225 - [live chess engine tournament viewer](https://ijccrl.com/live-chess-engine-tournament-viewer/): 1. Overview: what we are building In this guide we will build a live chess-engine tournament viewer on a VPS running Ubuntu 24.04 LTS. The architecture is deliberately simple: As a concrete example we will use the same engines we compiled on the server: Time control will be 180s + 2s, 1 thread per engine, 32 MB hash, and 5-piece Syzygy tablebases. You can obviously adapt the details to your own environment. The result is a clean, SEO-friendly page such as: https://live.ijccrl.com — “Blitz IJCCRL Elite Chess Engines” viewable from any browser without extra plugins. 2. Prerequisites 2.1. VPS and domain…  - [Wordfish 3.60 lifetime edition 2026](https://ijccrl.com/wordfish-3-60-lifetime-edition-2026/): Summary - [Deepalienist 2.20 011225](https://ijccrl.com/deepalienist-2-20-011225/): Summary - [Africaata ctg update 010125](https://ijccrl.com/africaata-ctg-update-010125/): Summary - [Guide of fastchess in linux running sprt](https://ijccrl.com/guide-of-fastchess-in-linux-running-sprt/): Installing FastChess on Ubuntu 20.04 LTS and Running an SPRT Test 1. Introduction Reliable testing is the backbone of modern chess-engine development. When we wish to determine whether a new binary is genuinely stronger than a baseline, we require: FastChess is a high-performance command-line tool designed precisely for this purpose: it orchestrates engine-versus-engine tournaments, supports concurrent games, reads both PGN and EPD opening books, and offers first-class support for Sequential Probability Ratio Tests (SPRT). (GitHub) In this tutorial, we shall: The goal is that a technically minded user, even if not yet familiar with Linux, can follow the procedure and reproduce…  - [Revolution 2.70 291125](https://ijccrl.com/revolution-2-70-291125/): Summary 1. Add scripts in `scripts/` to run auto-played matches with Fishtest-compatible PGN logging and export metrics (nps, eval drift, TT hit rate).* Include a checklist of benchmark steps in `CONTRIBUTING.md` to standardize testing before merges * Publish summary results in an artifact (CSV/JSON) for historical tracking in CI Download - [Africaata ctg 291125](https://ijccrl.com/africaata-ctg-291125/): Summary - [Africaata bin book 291125](https://ijccrl.com/africaata-bin-book-291125/): Summary - [Pullfish 2.70 271125](https://ijccrl.com/pullfish-2-70-271125/): Summary Download - [Deepalienist with AVX2/FMA3 PEXT support](https://ijccrl.com/deepalienist-with-avx2-fma3-pext-support/): Deepalienist – a Lifetime resource for advanced engine users Deepalienist is an advanced open-source UCI chess engine designed for serious analysis and competitive engine-versus-engine play. It extends the classical alpha-beta search paradigm with a modern evaluation based on NNUE networks, an experience system, and a carefully curated testing methodology, while remaining fully compliant with the GPL-3.0 licence.(GitHub) Within the wider IJCCRL / JCCRL ecosystem, Deepalienist already occupies a prominent place in bullet rating lists among Stockfish-derived engines, reflecting its practical strength at fast time controls.(IJCCRL) As part of a long-term project curated by Jorge Ruiz Centelles, the engine is continuously refined…  - [Tribute to Sedat Canbaz](https://ijccrl.com/tribute-to-sedat-canbaz-tribute-to-sedat-canbaz/): Revolution Crowned SCCT NN-CS-65 Champion – A Tribute to Sedat Canbaz and SedatChess The latest edition of SCCT NN-CS-65 at SedatChess has concluded with a remarkable result: Revolution 3.60 has taken first place in its very first participation, emerging as champion ahead of an elite field of 3800+ Elo engines.(Google Sites) Hosted on SedatChess, the long-running home of Sedat’s Computer Chess Tournaments (SCCT), this NNUE championship assembled many of today’s most advanced AVX2-optimised engines under carefully standardised conditions. According to the official crosstable, Revolution 3.60 leads the table with an estimated 3841 Elo, narrowly ahead of Stockfish X 231125 and several…  - [Architecture-Aware Builds in the Revolution](https://ijccrl.com/architecture-aware-builds-in-the-revolution/): Architecture-Aware Builds in the Revolution Chess Engine: From Sandy Bridge to AVX-512 One of the defining goals of the Revolution chess engine project is to extract every last unit of performance from modern hardware while remaining accessible to users with older systems. As the x86-64 ecosystem has evolved, the gap between a legacy Sandy Bridge server and a contemporary Ryzen or AVX-512-capable Xeon has widened dramatically. A single “one-size-fits-all” binary inevitably leaves performance on the table for a large fraction of users. The current generation of Revolution addresses this challenge directly by offering multiple binaries optimised for specific instruction sets—from SSE3…  - [Pullfish 251125 patch stockfish team](https://ijccrl.com/pullfish-251125-patch-stockfish-team/): Summary - [Rubichess 231125 new nnue added](https://ijccrl.com/rubichess-231125-new-nnue-added/): Summary Download Rubichess231125 compiled by Jrc - [Montar un visor de partidas de ajedrez en vivo](https://ijccrl.com/montar-un-visor-de-partidas-de-ajedrez-en-vivo/): Guía: Montar un visor de partidas de ajedrez en vivo Requisitos Previos 📋 1. Instalación de Node.js y descarga de node-tlcv 2. Configuración de node-tlcv Una vez instalado, hay que configurar node-tlcv para que se conecte a la fuente de partidas (TLCS) y sirva la interfaz web correctamente: 3. Compilación y ejecución del visor node-tlcv Con la configuración lista, proceda a construir y lanzar el servidor de visualización: 4. Integración de las partidas en vivo desde CuteChess CLI El desafío principal es conectar las partidas generadas por CuteChess CLI al sistema TLCS/TLCV para que sean visibles en el visor web: En…  - [Revolution 3.60](https://ijccrl.com/revolution-3-60/): Summary Download Revolution 3.60 Download avx2 and bmi2 - [Africaata 2026 opening book lifetime edition](https://ijccrl.com/africaata-2026-opening-book-lifetime-edition/): The AfricaATA2026 Lifetime Edition is a tournament-ready opening book for chess engines, designed specifically for the PlayChess server and for Stockfish-derived engines such as Revolution, Wordfish, SirioC, Pullfish and DeepAlienist. Used under the PlayChess username “Desvelemosafrica”, this book has already demonstrated its practical strength: it occupies the leading positions of the Top-100 module rankings in all three main time-control categories – Bullet, Blitz and Classical. The attached screenshots from the PlayChess engine room document these results and provide independent confirmation of its performance against strong opposition. This presentation sets out what AfricaATA2026 Lifetime Edition is, how it has been tested, and…  - [Wordfish 3.50 lifetime edition 2026](https://ijccrl.com/wordfish-3-50-lifetime-edition-2026/): Wordfish 3.50 – 2026 Lifetime EditionA flagship Stockfish-derived engine for IJCCRL Lifetime members Wordfish 3.50 – 2026 Lifetime Edition represents a decisive new step in the evolution of the Wordfish project. Building on the foundations laid by Wordfish 1.0 – an advanced Stockfish-derived engine introduced with dedicated build and configuration guides on JCCRL(Jccrl) – this new release has been carefully redesigned for demanding engine users, correspondence analysts and serious tournament organisers. At its core, Wordfish 3.50 remains faithful to the philosophy of the IJCCRL ecosystem: take the modern Stockfish search and evaluation framework, one of the strongest open-source engines available, and…  - [DeepAlienist vs Revolution 3.40-081125](https://ijccrl.com/deepalienist-vs-revolution-3-40-081125/): DeepAlienist vs Revolution 3.40-081125 Internal FastChess gauntlet comparing the new DeepAlienist baseline against Revolution 3.40-081125. Setting Value Time control / Threads 10s + 0.1s / 1 thread Hash 32 MB Book / Format UHO_Lichess_4852_v1.epd (EPD, random) DEV Revolution 3.40-081125 BASE DeepAlienist Match result (DEV vs BASE) Elo (DEV − BASE): −25.37 ± 11.16 Interpretation: DeepAlienist ≈ +25 Elo vs Revolution 3.40 at this TC LOS (DEV better than BASE): 0.00 % Games: 1180 (DEV: 256 W / 342 L / 582 D) Score (DEV): 46.36 % Draw ratio: 45.93 % Under these controlled conditions, DeepAlienist consistently outperforms Revolution 3.40-081125, confirming its role as the…  - [Pullfish update](https://ijccrl.com/pullfish-update/): Summary - [How to Create a CTG Opening Book](https://ijccrl.com/how-to-create-a-ctg-opening-book/): CTG Opening Book This tutorial walks you through, in detail, how to create a ChessBase CTG opening book from zero using Fritz 20 as your GUI. The goal is a reproducible workflow you can use for: Throughout the text I will refer to “Fritz 20”, but the menus are almost identical in Fritz 17–19, so most steps work across recent versions. 1. What exactly is a CTG opening book? CTG is the proprietary ChessBase opening-book format (“ChessBase Opening Tree of Games”). A CTG book is not just a list of moves; it is a tree of positions with statistics and engine…  - [Killfish vs Deepalienist uho 2024 big 8mvs +1.00-+1.10](https://ijccrl.com/killfish-vs-deepalienist-uho-2024-big-8mvs-1-00-1-10/): The Killfish chess engine, developed by the Mexican programmer Antonio Calzada, is a high-performance Stockfish derivative designed primarily for fast time controls and practical engine competition. Within the contemporary ecosystem of NNUE-based engines, Killfish has emerged as a specialised tool for bullet and blitz play, combining the raw tactical power of Stockfish with targeted refinements and frequent, carefully curated builds by its author.(X (formerly Twitter)) As a derivative, Killfish inherits the fundamental architecture of Stockfish—bitboard representation, alpha–beta search with sophisticated pruning, and an NNUE (Efficiently Updatable Neural Network) evaluation framework. On top of this foundation, Calzada is known for a hands-on,…  - [Deepalienist new strong engine uci](https://ijccrl.com/deepalienist-new-strong-engine-uci/): DeepAlienist Chess Engine (Stockfish-Derived) DeepAlienist is a Stockfish-derived chess engine designed primarily for high–quality correspondence chess analysis, while remaining a very strong contender for engine–versus–engine play on online platforms. Built on a modern Stockfish code base, it focuses on delivering stable, deeply consistent evaluations that help correspondence players navigate complex middlegames and technically demanding endgames. In the context of IJCCRL, DeepAlienist is intended as a specialist tool for players and researchers who require reliable long–term analysis rather than purely rapid tactical shots. Its search behaviour is tuned to favour depth, robustness and clarity of plans, making it particularly suitable for exploring critical…  - [Revolution 3.40-081125](https://ijccrl.com/revolution-3-40-081125/): Why release Revolution 3.40-081125? Our automated testing pipeline (“Codex”) has formally green-lit Revolution 3.40-081125 after an extended SPRT A/B match against the current baseline (Revolution 3.10-300925). The new build shows a consistent, statistically supported gain at a practical rapid time control, with no evidence of instability or regression. Over 1,500 games at 10+0.1, 2 threads, 32MB hash, using the UHO_Lichess_4852_v1.epd suite, the DEV build achieved: In plain terms: Revolution 3.40-081125 is reliably stronger than the previous stable release under realistic tournament conditions, and the match conditions (pairing, colour balance, openings) were sufficiently clean to trust the result. Given Codex’s OK, the…  - [Wordfish-3.20- 101125 LiveBook](https://ijccrl.com/wordfish-3-20-101125-livebook/): Summary Download Wordfish-3.20-101125 - [Pullfish-2.30-071125 Lifetime Edition](https://ijccrl.com/pullfish-2-30-071125/): Summary Download Pullfish-2.30-071125 - [Trae AI for Programming on Windows](https://ijccrl.com/trae-ai-for-programming-on-windows/): 1. What Is Trae AI and Why Does It Matter? Trae AI (often branded simply as Trae or “Trae IDE”) is an AI-native integrated development environment (IDE) and plugin ecosystem created under ByteDance’s “Trae” product line. It combines a VS Code–style editor with agentic AI tools that can understand repositories, write code, fix bugs, run commands and even plan multi-step projects. (traeide.com) The Trae ecosystem currently includes three main components: (Skywork) Trae’s positioning is aggressive: it markets itself as “the real AI engineer” and has topped the SWE-bench Verified benchmark for solving real GitHub issues, which puts it in the same…  - [Wordfish LiveBook](https://ijccrl.com/wordfish-livebook/): Summary Testing Download Wordfish 3.10-071125 with live book added. - [Revolution 3.20-Dev-071125](https://ijccrl.com/revolution-3-20-dev-071125/): Summary Download revolution Device 3.20-071125 - [Africaata lifetime edition strong book on playchess](https://ijccrl.com/africaata-lifetime-edition-strong-book-on-playchess/): Africaata An Elite Opening Book for the Playchess Engine Room The Africaata opening book has been developed as a specialised repertoire for high-level engine play on Playchess. Designed and tested under the nickname Desvelemosafrica, this book is the result of systematic experimentation in the Playchess engine room and is available exclusively to holders of the IJCCRL Lifetime Membership. 1. Empirical Performance on Playchess The strength of Africaata is not a theoretical claim but a statistically supported result: This profile—massive sample size, extremely low loss rate, and sustained presence at the top of the rating list—indicates a repertoire that maximises stability without…  - [Revolution 3.10-051125](https://ijccrl.com/revolution-3-10-051125/): Summary Download Latest Revolution uci chess engine - [Pullfish strong engine derive of stockfish 17.1](https://ijccrl.com/pullfish-strong-engine-derive-of-stockfish-17-1/): Pullfish A New Generation Stockfish Derivative in the IJCCRL Ecosystem Pullfish is a modern chess engine built upon the Stockfish lineage, designed specifically for rigorous tournament play and high-speed online conditions. Within the International Jorge Chess Computer Rating List (IJCCRL) framework—one of the few projects that systematically benchmarks SSSE3-class engines across blitz, bullet and ultra-rapid controls—Pullfish already appears as a leading Stockfish derivative in dedicated bullet testing.(ijccrl.com) Preliminary results from the IJCCRL Bullet Derivates Stockfish list indicate that Pullfish 1.0 scores approximately 54% over more than 1,400 games, placing it in the same performance band as Stockfish 17.1 and advanced derivatives…  - [PlentyChess SSSE3 instruction](https://ijccrl.com/plentychess-ssse3-instruction/): PlentyChess SSSE3 SSSE3-Optimised Builds of PlentyChess: Design and Performance of the Codex-Assisted Integration PlentyChess is a state-of-the-art UCI chess engine whose evaluation is based on an efficiently updated neural network (NNUE). Its network is trained on billions of self-generated positions and the engine currently ranks among the very top engines on multiple public rating lists. (GitHub) The work carried out with Codex focuses on exploiting SSSE3-capable x86-64 processors by producing a dedicated SSSE3 binary and ensuring that PlentyChess’ NNUE kernels fully benefit from this instruction set. The result is a configuration that is significantly faster than the generic build on CPUs…  - [Wordfish-3.10 011125](https://ijccrl.com/wordfish-3-10-011125/): Wordfish Summary Download Wordfish-3.10.011125 - [Revolution 3.0 011125](https://ijccrl.com/revolution-3-0-011125/): Revolution 3.0 Summary Download Revolution 3.0-011125 - [SF-PG-011125 with 6 books support](https://ijccrl.com/sf-pg-011125-with-6-books-support/): SF-PG-011125 Summary Download SF-PG-011125 - [Stockfihs 17.1 dev with latest nnue](https://ijccrl.com/stockfihs-17-1-dev-with-latest-nnue/): Summary Testing Nnue Download Stockfish dev-20251030-nogit with the latest Nnue - [Wordfish-3.0 281025](https://ijccrl.com/wordfish-3-0-281025/): Summary No functional changes. Download Wordfish 3.0-281025 - [Optimisation Proposals for SPRT Testing in Fastchess](https://ijccrl.com/optimisation-proposals-for-sprt-testing-in-fastchess/): Optimisation Proposals for SPRT Testing in Fastchess The proposals below outline realistic optimisations for the Revolution engine. Each entry specifies the repository and a suggested tag to keep a compilable snapshot suitable for SPRT testing with Fastchess. Proposal Objective Key Changes Repository / Tag Primary Metric Risks & Mitigations 1. Adaptive Reductions in PVS Reduce failures in tactical positions while maintaining speed. Adjust Late Move Reductions in src/search.cpp by introducing an adaptive factor based on recent evaluation volatility, calibrated via Stack fields. revolution tag: sprt-lmr-adaptive-v1 Elo gain at blitz (5+0.1), then confirmation at LTC 60+0.1. Overfitting risk: validate with tests/puzzles; monitor…  - [Stockfish 17.1 (tag sf_17.1, 30-Mar-2025) vs Dev version](https://ijccrl.com/stockfish-17-1-tag-sf_17-1-30-mar-2025-vs-dev-version/): Versión Área Cambio Archivos o PR Efecto 17.1 (30-Mar-2025) UCI / CLI Nuevo comando speedtest para medir NPS con un set de posiciones estable Docs: “UCI & Commands → speedtest” Benchmark integrado y reproducible para comparar hardware; no cambia la fuerza de juego per se. 17.1 (30-Mar-2025) Motor / Concurrencia Eliminado el límite fijo de 1024 hilos; Threads puede igualar la concurrencia real Nota de lanzamiento 17.1 Mejor escalado en equipos con muchos núcleos/sockets. 17.1 (30-Mar-2025) Búsqueda / Gestión de tiempo Ajustes para comprobar y evitar pérdidas por reloj Nota de lanzamiento 17.1 Menos “time trouble” en iteraciones largas. 17.1 (30-Mar-2025)…  - [Using Codex AI with the Revolution Chess Engine](https://ijccrl.com/using-codex-ai-with-the-revolution-chess-engine/): Title & Hook (00:00–00:30) On-screen title:“From Zero to PR: Using Codex AI with the Revolution Chess Engine (Windows + Git)” Narration:“In this tutorial we’ll use Codex AI to edit and ship changes to Revolution, a UCI chess engine. You’ll see how to set up a Windows build toolchain, compile the engine, ask Codex for a code patch, test it, and open a Pull Request — all the way through to merge.” What You’ll Need (00:30–01:05) On-screen bullets: Narration:“We’ll work on Windows with MSYS2 + Clang. If you build Stockfish-style engines, this will feel familiar.” (official-stockfish.github.io) Scene 1 — Project Tour (01:05–01:50)…  - [Wordfish 2.90 231025](https://ijccrl.com/wordfish-2-90-231025/): Wordfish 2.90 Summary Download Wordfish 2.90 - [SF-PG-071025 with 6 books support](https://ijccrl.com/sf-pg-071025-with-6-books-support/): Summary Download chess engine - [Wordfish 2.81 071025 fix bug experience files](https://ijccrl.com/wordfish-2-81-071025-fix-bug-experience-files/): Summary Download Wordfish-2.81-071025 - [Sprt test fastchess Revolution 2.81 vs Baseline](https://ijccrl.com/sprt-test-fastchess-revolution-2-81-vs-baseline/): Great run — big sample, nearly clean pairing. TL;DR (4000 games, 10+0.1, 1t, 64 MB, UHO_Lichess_4852_v1.epd) What it means Quick recommendations Revolution 2.81 scores 50.65% Revolution 2.81 vs 2.80 (10+0.1, 1 thread, 64 MB, UHO_Lichess_4852_v1.epd).Over 4,000 games, Revolution 2.81 scores 50.65%, corresponding to +4.5 Elo (±5.4) with LOS 95%. Pairing quality is high (PairsRatio 1.10). This indicates a small, reproducible strength increase on this test matrix, suitable for CI/gauntlet use. As usual, improvements are book- and TC-dependent; results may vary on other suites or time controls. Download games sprt test Download Chess engine Jorge Ruiz connoisseur of both chess and anthropology,…  - [ZurgaaPOLY 18.1AI SSE-251004 vs revolution 2.81 021025](https://ijccrl.com/zurgaapoly-18-1ai-sse-251004-vs-revolution-2-81-021025/): ZurgaaPOLY Technical Match Report: revolution 2.81 (021025) vs ZurgaaPOLY 18.1AI SSE-251004 — PGN-Backed Findings from a 1,000-Game Trial (881 Completed) This report analyses a long match between two modern chess engines—revolution 2.81 (021025) and ZurgaaPOLY 18.1AI SSE-251004—using the supplied PGN plus rating summaries from Ordo and BayesElo. Although the match was scheduled for 1,000 games, the artifacts currently include 881 completed games. Ordo rates revolution ahead by ~29 Elo (3700.0 vs 3671.3) with a 54% score over 881 games, while BayesElo shows a similar +30 Elo gap (+15/−15 with ±10 Elo error) and a notably low 26% draw rate. Data &…  - [Wordfish 2.80 061025](https://ijccrl.com/wordfish-2-80-061025/): Summary Go Depth 1 Bench Download Wordfish-2.80-061025 Jorge Ruiz connoisseur of both chess and anthropology, a combination that reflects his deep intellectual curiosity and passion for understanding both the art of strategic chess books - [SF-PG-041025 fix bugs](https://ijccrl.com/sf-pg-041025-fix-bugs/): Summary Download chess engine - [Codex Chatgpt in chess engines code](https://ijccrl.com/codex-chatgpt-in-chess-engines-code/): Environment configuration Fix benchmark I need to locate the AGENTS.md file for further instructions. I need to locate the AGENTS.md file. Let’s search for it. No AGENTS found. I’ll check the build instructions and examine the source, especially C++. I’ll rename the compiled file to “Sirioc 1.0.exe”, likely through the makefile. Summary scripts/get_native_properties.sh Makefile tests/reprosearch.sh Conclusion: What Codex ChatGPT Changes in Chess-Engine Development Codex ChatGPT meaningfully compresses the distance between an idea and a reproducible implementation. In UCI chess-engine work—where gains hinge on dozens of interacting subsystems (move generation, search, NNUE eval, TT/cluster policy, time-management)—the model excels as an “always-on” pair-programmer…  - [Revolution 2.80 vs Baseline](https://ijccrl.com/revolution-2-80-vs-baseline/): Revolution 2.80 vs Baseline — Summary for Release Notes Executive summary Across three gauntlets at identical test conditions (10+0.1, 1 thread, 32 MB hash, UHO_2024_8mvs_+085_+094), Revolution 2.80 scores a small but robust Elo gain over the baseline. Aggregating all runs (4,260 games), the meta-estimate is +13.9 Elo ± 5.6 in favor of Revolution 2.80. This corresponds to a 52.0% score rate overall (approx.), consistent with a modest but statistically meaningful improvement for practical play and continuous integration benchmarks. Per-run results Run Games Score Elo (±) Notes A 2,000 52.42% +16.86 ± 8.37 LOS 100%, PairsRatio 1.38. B 2,000 51.48% +10.25 ±…  - [SF-PG-300925 polyglota support](https://ijccrl.com/sf-pg-300925-polyglota-support/): SF-PG-300925 A Stockfish-Derived Engine with Native Polyglot Book Support Executive summary SF-PG-300925 is a fresh derivative of the Stockfish chess engine that integrates native support for Polyglot (.bin) opening books while preserving the tactical strength, NNUE evaluation, and UCI compatibility of its upstream base. Distributed under GPLv3, the project documents a clear UCI identity (id name SF-PG-300925) and positions itself for practical use in GUIs like Fritz and CuteChess. Its repository highlights the authorship triad—Stockfish developers (upstream), Jorge Ruiz, and Codex ChatGPT—and provides a familiar Stockfish-style build flow for Linux, macOS, and Windows. (GitHub) What is SF-PG-300925? SF-PG-300925 is a UCI…  - [Revolution 2.80](https://ijccrl.com/revolution-2-80/): Summary 1. Correction-history tuning is still using the older multipliers and zero fallback. Upstream 4e3c185 retuned the correction-history blend (including the default continuation term when no previous move is available) to improve static-eval calibration, but Revolution still multiplies the four components by the previous coefficients and skips updates when bonus == 0. That mismatch skews to_corrected_static_eval, hurting move ordering and pruning compared to Stockfish’s current baselin. 2. Null-move pruning still uses the older gate and shallow reduction. The current code only enables null moves when a rook’s worth of material remains (or three pawns) and reduces depth by 3 + depth/4. Stockfish’s latest tuning…  - [Building a UCI NNUE Chess Engine in C++](https://ijccrl.com/building-a-uci-nnue-chess-engine-in-c/): Building a UCI NNUE Chess Engine This article presents a complete, end-to-end roadmap for building a modern chess engine in C++ that speaks the Universal Chess Interface (UCI) and evaluates positions using NNUE (Efficiently Updatable Neural Networks). We begin with protocol and software design, continue through board representation and move generation, formalise search and time management, and then integrate an NNUE evaluator with accumulator updates and integer-domain inference. We conclude with training guidance, benchmarking, correctness testing, and production hardening. Key references are provided to the Chess Programming Wiki (UCI and NNUE), the UCI summary on Wikipedia, and Stockfish NNUE resources and…  - [Wordfish v.2.70-dev-250925](https://ijccrl.com/wordfish-v-2-70-dev-250925/): Summary NNUE Download wordfish v.2.70-dev-250925 - [Revolution v2.74-dev-250925-tsd1](https://ijccrl.com/revolution-v2-74-dev-250925-tsd1/): Summary SPRT Download revolution uci chess engine - [Wordfish_230925_v.2.60](https://ijccrl.com/wordfish_230925_v-2-60/): Summary Download Wordfish uci chess engine - [Revolution v.2.73-dev-230925-wk](https://ijccrl.com/revolution-v-2-73-dev-230925-wk/): Summary Testing Download Revolution uci chess engine - [Revolution_2.70_210925 SPRT 2K 10s+0.1](https://ijccrl.com/revolution_2-70_210925-sprt-2k-10s0-1/): Revolution 2.70 vs 2.40 — 2000-game SPRT/Fixed-N analysis Revolution 2.70 vs 2.40 — 2000-game analysis Time control 10+0.1 · Threads=1 · Hash=32 · UHO_2024_8mvs_+085_+094.pgn · Paired per line Headline Overall: 617–591–792 (2000 games) → score 0.506 (≈ +4.5 Elo, LOS 77%). Draw rate 39.6%. Color split (DEV): White 584–29–387 → 0.777, Black 33–562–405 → 0.235. Extreme white/black skew remains. DEV score by color Summary Metric Value Total games (DEV) 2000 Overall score 0.506 As White (W-L-D, score) 584-29-387, 0.777 As Black (W-L-D, score) 33-562-405, 0.235 BayesElo / Ordo BayesElo excerpt: Rank Name Elo + - games score oppo. draws 1 revolution_2.70_210925…  - [Wordfish v.2.50 dev-210925](https://ijccrl.com/wordfish-v-2-50-dev-210925/): Summary Download Wordfish 2.50 dev-210925 - [Revolution v.2.70 dev-210925](https://ijccrl.com/revolution-v-2-70-dev-210925/): Summary Test Point estimate (for context) SPRT with typical hypotheses Assume the usual H₀: Δ=0 Elo vs H₁: Δ=+2.5 Elo (or your earlier +10 Elo) and α=β=0.05.SPRT decision boundaries (in LLR units): A = +2.944, B = −2.944. Using your counts (W=240, L=231, D=279), and treating the draw rate as fixed under both hypotheses (so draws cancel in the LLR), the current log-likelihood ratio is: You’re miles away from either boundary (±2.944). That’s why your runner shows SPRT: llr 0. How many more games would SPRT need? With the observed draw rate (d ≈ 0.372) and empirical “true” win probability for…  - [SPRT TEST Revolution dev versus Baseline](https://ijccrl.com/sprt-test-revolution-dev-versus-baseline/): Snapshot of the current match How this compares to earlier runs (regression from the beginning) What to take from this Recommended next steps (quick, practical) Bottom line: today’s result is encouraging—a marked improvement over the early negative regressions—but not yet decisive. Keep the current setup and extend the run so the statistics can speak clearly. - [Wordfish in playchess.com machines room](https://ijccrl.com/wordfish-in-playchess-com-machines-room/): Overview of Results (September 18, 2025) On September 18, 2025, the Wordfish chess engine (operating under the PlayChess nickname “Desvelemosafrica”) delivered a highly solid performance in the PlayChess.com “machines” room. Over the course of 92 games played that day, Wordfish remained undefeated, scoring a total of 49.5 points (approximately 54% score). This score was achieved through a large majority of drawn games and a handful of wins – remarkably, Wordfish did not lose a single game. Its Ordo rating for the day was computed around 3700, which placed it on par with virtually all the other top engines active that day.…  - [Revolution v2.60 modern source code](https://ijccrl.com/revolution-v2-60-modern-source-code/): Summary Testing make -C src build ARCH=x86-64-sse41-popcnt ./revolution_2.60_190925 bench Download revolution 2.60 190925 - [Wordfish 190825 v2.42](https://ijccrl.com/wordfish-190825-v2-42/): Summary Test Download wordfish_190825_v2.42 - [Wordfish 2.41 dev-150925](https://ijccrl.com/wordfish-2-41-dev-150925/): Summary Download wordfish 2.41 dev-150925 - [Obsidian 16.14 ssse3 support update nnue](https://ijccrl.com/obsidian-16-14-ssse3-support-update-nnue/): Summary Download Obsidian 16.14 ssse3 support nnue update - [Revolution 2.41 dev-150925](https://ijccrl.com/revolution-2-41-dev-150925/): Summary Strategy sprt test Perfect—here’s a step-by-step, one-patch-at-a-time plan for Codex.Each step: Pre-condition for fair A/B (do this once before XP-1)Build both BASE and DEV as x86-64-sse41-popcnt on Ivy Bridge. CMake (add to target):-O3 -DNDEBUG -fno-exceptions -fno-rtti -msse4.1 -mpopcnt -mno-avx -mno-avx2 -mno-bmi2 -mtune=ivybridgeMakefile profile (ARCH=x86-64-sse41-popcnt):-msse4.1 -mpopcnt -mno-avx -mno-avx2 -mno-bmi2 -mtune=ivybridge Experiment Harness (add once) FILES: src/ucioption.cpp, src/search.h, src/search.cpp (or your nearest equivalents) XP-1 — Time clamp (fast-TC stabiliser) Goal: Minimum think time + panic margin + adaptive overhead. FILES: src/timeman.h, src/timeman.cpp Quick test:fastchess ... -each tc=10+0.1 -games 300 -sprt elo0=0 elo1=6 "opt.XP1 TimeClamp"=true XP-2 — Aspiration window predictable widening FILE: src/search.cpp…  - [Revolution dev- v.2.40 130925](https://ijccrl.com/revolution-dev-v-2-40-130925/): Summary Test Download revolution dev- v.2.40 130925 - [Wordfish v 2.40 120925 avx third nnue embed](https://ijccrl.com/wordfish-v-2-40-120925-avx-third-nnue-embed/): Summary Uci chess console Download Wordfish v2.40 120925 avx - [Loreal match Revolution Vs HypnoS](https://ijccrl.com/loreal-match-revolution-vs-hypnos/): Revolution vs HypnoS at 60s+2.0 (Fritz 20, 4 Threads, 512 MB Hash) A data-driven match report on the UHO_2022_8mvs_big_+100_+129 suite Executive summary This report analyses a 100-game head-to-head match between revolution v.2.30 dev-120925, avx (hereafter Revolution) and HypnoS ++ 1.03 popcnt (HypnoS) played in Fritz 20 at 60 seconds + 2.0 seconds increment (60s+2.0), with 4 threads per engine and 512 MB hash for both engines. Openings were drawn from UHO_2022_8mvs_big_+100_+129, with colour-reversed pairs so both engines faced the same line with both colours. Top-line result: Revolution scored 55.0/100 (55%) to HypnoS’s 45.0/100 (45%). In Elo terms that translates to +35…  - [Integrate a Third NNUE in Wordfish](https://ijccrl.com/integrate-a-third-nnue-in-wordfish/): Integrate a Third NNUE Network in Wordfish (FalconFile) 0) What you’ll need Note: There is no 3.net in the Wordfish repository. You must obtain an NNUE weight from a trusted source (e.g., official Stockfish network releases). Then either keep its original filename or rename it to 3.net if you like the convention. 1) Obtain the network file Windows (PowerShell) Windows (CMD) Linux / macOS (Optional) Verify checksumIf the source publishes a checksum: Compare the output with the published hash. 2) Place the network file You have two common choices: Examples: 3) Tell Wordfish to use the network (UCI FalconFile) A) Plain…  - [Optimising Windows and hardware for UCI Chess Engines](https://ijccrl.com/optimising-windows-and-hardware-for-uci-chess-engines/): Windows 10 Pro Workstation and Server-Class Hardware for UCI Chess Engines Executive summary UCI engines are essentially CPU-bound scientific workloads with strong sensitivity to latency, cache locality and memory bandwidth. On Windows 10 Pro Workstation running on multi-socket Xeon/EPYC servers—or high-core desktops—the largest gains come from: This guide gives you a principled workflow: set hardware/firmware, prepare Windows, set process affinity/priority, pick engine options, verify with PerfMon, iterate. You’ll also get drop-in shell (PowerShell and CMD) snippets for everyday operations. 1) First principles: how UCI engines use your machine 1.1 CPU, threads, and NUMA Modern engines are heavily search-bound; their parallelism scales…  - [Wordfish v. 2.30 110925](https://ijccrl.com/wordfish-v-2-30-110925/): Summary Download Wordfish v. 2.30 110925 - [Revolution v.2.21 110925 avx](https://ijccrl.com/revolution-v-2-21-110925-avx/): Summary Refactor code for pointer declarations Replace include guards with #pragma once Replace macros with inline constants Download revolution v.2.21 dev-110925 - [STC LTC SPRT Test revolution](https://ijccrl.com/stc-ltc-sprt-test-revolution/): SPRT TEST REVOLUTION revolution_090925_v2.20_avx vs Revolution SPRT completed — H₀ accepted (no improvement). Time control: 60+0.1; Openings: UHO_Lichess_4852_v1.epd Elo ± err-32.01 ± 15.19 nElo ± err-60.71 ± 28.62 LOS0.00% Games566 Score123-175 (268 draws) Draw ratio46.64% Pairs ratio0.51 LLR (A,B)-2.99 (A=-2.94, B=2.94) Timeouts / Crashes1 / 0 Notes: Wald bounds reflect α and β shown by the tester; LLR point is the final value at n = games. revolution_090925_v2.20_avx vs Revolution SPRT completed — H₀ accepted (no improvement). Time control: 10+0.1; Openings: UHO_Lichess_4852_v1.epd Elo ± err-59.50 ± 20.56 nElo ± err-108.79 ± 36.82 LOS0.00% Games342 Score56-114 (172 draws) Draw ratio40.35% Pairs ratio0.32…  - [wordfish dev 070925 v2.0.1 vs Revolution ](https://ijccrl.com/wordfish-dev-070925-v2-0-1-vs-revolution/): SPRT Result — wordfish_dev_070925_v2.0.1 vs Revolution (10+0.1) Status: Strong Regression Test WF_dev_070925_v2.0.1_vs_REV_10+0.1_run2_784 using UHO_2024_8mvs_+085_+094.pgn, α=β=0.05 (Wald bounds A≈-2.944, B≈+2.944). Sequential evidence: LLR = -2.63. LLR vs Games with Wald A/B bounds (computed from α and β). Metric Value Engines wordfish_dev_070925_v2.0.1 vs Revolution Time control 10+0.1 (1 thread) Games 784 Score 343.5 / 784 (43.81 %) W / L / D 145 / 242 / 397 Draw ratio 50.64 % Elo (±) -43.21 ± 12.39 nElo (±) -85.75 ± 24.32 LOS 0.00 % LLR / bounds -2.63 (A=-2.944, B=+2.944) Pentanomial [11, 124, 210, 45, 2] Recommendation: Given the strong negative signal (Elo…  - [Collection of .bat files to run FastChess](https://ijccrl.com/collection-of-bat-files-to-run-fastchess/): Collection of .bat files to run FastChess (ready-to-use) Here’s a tidy, SEO-friendly toolkit of Windows .bat launchers for FastChess based on your own SPRT example and notes. I’ve kept your two Revolution builds as the base pair, and—when needed—added Stockfish 17.1 and Obsidian 16.40 exactly as you requested. The pack covers 180+2 and 900+15 time controls across SPRT, 1v1 matches, round-robin, gauntlet, and a Swiss-style harness (see note below). Each script is self-contained, sets sane defaults for logging/PGN, and prints running output in Cutechess format for easier parsing. FastChess flags follow the current public docs and examples. (GitHub, official-stockfish.github.io) What’s included (engines & formats) Quick start (edit once, run forever) Why these flags? They mirror the examples shown in the FastChess…  - [Wordfish 2.10 deep junior style](https://ijccrl.com/wordfish-2-10-deep-junior-style/): Summary Download Wordfish 2.10 dev-090925 avx - [Revolution v.2.20 dev-090925](https://ijccrl.com/revolution-v-2-20-dev-090925/): Summary Testing Download Revolution v.2.20 dev-090925 avx - [SPRTRevolution_BASE vs Revolution_DEV](https://ijccrl.com/sprtrevolution_base-vs-revolution_dev/): Here’s a clear, SPRT-style reading of your head-to-head match. SPRT interpretation — Revolution_BASE vs Revolution_DEV What the data says Uncertainty & confidence SPRT verdict (how to read this) Practical takeaway Quick cross-check (sanity) .here are copy-paste ready Fastchess SPRT commands (Windows) for your typical targets. I’ve used the correct Fastchess syntax for engine options (no initstr—use option.*), included a sane Fishtest-style adjudication + openings setup, and set a large cap so the run auto-stops as soon as SPRT hits a boundary. Standard patch test — H₀: 0 Elo vs H₁: +10 Elo (α=β=5%) Why this layout? Micro-gain test — H₀: 0…  - [Wordfish deep junior style](https://ijccrl.com/wordfish-deep-junior-style/): Dynamic activity bonus for aggressive evaluation Rebalance the evaluation towards piece activity Aggressive king safety Selective search adjustments Configurable aggressive-style parameter NNUE training/tuning Continuous measurement and testing Download Wordfish Deep Junior Style - [MonteCarlo Tree Search section in wordfish 2.0](https://ijccrl.com/montecarlo-tree-search-section-in-wordfish-2-0/): Monte Carlo Tree Search Options (Experimental) Wordfish uci chess engine includes experimental support for Monte Carlo Tree Search (MCTS) to explore certain position types inspired by Shashin’s classification. The feature is based on original work by Stephan Nicolet and aims to leverage Lc0-style search in Petrosian high, high middle and middle positions. UCI Options Credits The Monte Carlo Tree Search algorithm was originally introduced by Rémi Coulom in Efficient Selectivity and Backup Operators in Monte-Carlo Tree Search (2006). For an overview and further references see the Chess Programming Wiki. Download Wordfish MCTS - [Revolution Dev vs. Base Understanding the Regression](https://ijccrl.com/revolution-dev-vs-base-understanding-the-regression/): Revolution Dev vs. Base: Understanding the Regression, Why SPRT Didn’t Decide, and How We Turn It Around Executive summary Across multiple Fastchess runs you shared—at both blitz-ish (10+0.1) and longer (60+0.1) controls—the development branch of the Revolution UCI engine tends to trail the base (mainline) Revolution by roughly +20 to +30 Elo in favour of the base. In statistical terms, most longer matches produce confidence intervals that exclude 0, whereas individual short runs can still swing widely. The Sequential Probability Ratio Test (SPRT) you configured with H0 = 0 Elo and H1 = +10 Elo has not accepted H1 or H0…  - [Revolution dev 1.0.1 040925](https://ijccrl.com/revolution-dev-1-0-1-040925/): I have uploaded to the main branch the source code of the version that surpasses all the ones I have created, including yesterday’s, with some more functions. After thousands of games in SPRT tests, he always ends up passing with at least five elo points. We’ve added the following: Experience Learning UCI Options Minimum Thinking Time The Minimum Thinking Time option ensures the engine spends at least a specified number of milliseconds searching for a move, even if it finds a good one instantly. This avoids extremely fast, low-quality replies. Set it with:setoption name Minimum Thinking Time value Falcon Net Revolution…  - [Test SPRT revolution 2.0 versus baseline](https://ijccrl.com/test-sprt-revolution-2-0-versus-baseline/): Test Summary ✅ Interpreting Results 🧾 Bottom Line I’ll use the standard rule that the Elo uncertainty (σ) falls as1/N1/\sqrt{N}1/N​maintaining the same TC, book and draw rate. Current data: Projection formula: Naim=N0(s0saim)2N_{\text{objetivo}} = N_0 \left(\frac{\sigma_0}{\sigma_{\text{objetivo}}}\right)^2Naim​=N0​(saim​s0​​)2 Case A) You want ±5 Elo as 1σ NA=2178(7.975)2≈5534 partidasN_A = 2178 \left(\frac{7.97}{5}\right)^2 \approx \mathbf{5534\ partidas}NA​=2178(57.97​)2≈5534 matches Additional items ≈ 5534 − 2178 = 3356 . Case B) You want ±5 Elo at 95% (95% ≈ ±1.96s \pm 1.96\sigma± 1.96 s ⇒ saim=5/1.96≈2.55\sigma_{\text{objective}} = 5/1.96 \approx 2.55saim​=5/1.96≈2.55) NB=2178(7.972.55)2≈21259 partidasN_B = 2178 \left(\frac{7.97}{2.55}\right)^2 \approx \mathbf{21259\ partidas}NB​=2178(2.557.97​)2≈21259 matches Additional items ≈ 21259 − 2178 = 19081 . Quick Notes Download Revolution 2.0 - [Native UCI Chess Engine Broadcast Software for Windows](https://ijccrl.com/native-uci-chess-engine-broadcast-software-for-windows/): Native UCI Chess Engine Broadcast Software for Windows: Trial Access, Rental Terms, and Confidentiality Framework A native Windows broadcast application for UCI chess engine tournaments is now available under a controlled trial and rental model. This is not a sale of software and it does not involve any transfer of source code, ownership, or development rights. The project remains the exclusive intellectual property of Jorge Ruiz Centelles and is offered only for operational use under defined contractual conditions. The system has been developed from scratch using JavaScript, Node.js, HTML, CSS, WebSocket-based real-time transport, JSON-based state handling, and PowerShell orchestration for deployment…  - [Africaata ctg update v.150426](https://ijccrl.com/africaata-ctg-update-v-150426/): Africaata CTG Update v.150426 — Manual Validation and Trojan-Move Cleanup Updated release focused on stricter backend validation, controlled move admission, and removal of corrupted historical noise from the opening book What Changed in v.150426 No games are imported anymore unless they have first been checked to confirm that they do not contain malicious Trojan moves. The workflow has moved to a manual backend evaluation of won and lost games in order to decide whether new moves should be added to the CTG book. Draws are no longer treated as generic bulk input. Only draws with a minimum of 30 moves and…  - [How to use the broadcast](https://ijccrl.com/how-to-use-the-broadcast/): IJCCRL Admin & User Guide IJCCRL · Embedded Guide How to use the broadcast account, admin area, and chat control This page is designed to be embedded as a static HTML block inside your website. It explains the current verified workflow for guests, registered users, premium users, and the administrator area in the IJCCRL broadcast environment. Guest chat enabled Support pages enabled Premium purchase enabled Vote & leaderboard enabled Admin pages enabled For visitors and users The public broadcast can be used in guest mode. A visitor can enter the chat with a nickname, watch the live boards, open the Support…  - [Wordfish-4.70-130426](https://ijccrl.com/wordfish-4-70-130426/): Wordfish-4.70-130426 — Official IJCCRL Release Stockfish-derived • Upstream qsearch TT correction • SFNNv14-aligned NNUE feature path • AVX512ICL write_indices path • Deterministic per-ARCH EXE/UCI identity preserved 🏆 IJCCRL Verified Wordfish-4.70-130426 supersedes Wordfish-4.60-310326 as the current IJCCRL verified build. Whereas 4.60 was a deliberately narrow NNUE maintenance release centred on temporary-buffer lifetime and initialisation discipline, 4.70 is a broader but still controlled upstream-alignment and low-level NNUE/search maintenance release. Its core technical scope is the integration of the official Stockfish bb4eb04 qsearch transposition-table correction together with the corresponding SFNNv14-era NNUE feature-path alignment already present in the official source snapshot used as reference. What…  - [Revolution-5.30-090426](https://ijccrl.com/revolution-5-30-090426/): Revolution-5.30-090426 — Official IJCCRL Release Stockfish-derived • Upstream-aligned qsearch stalemate-detection update • Narrow search maintenance release • Deterministic ISA identity retained 🏆 IJCCRL Verified Revolution-5.30-090426 is the current IJCCRL-maintained Stockfish-derived release. Relative to Revolution-5.20-040426, the present branch update is a deliberately narrow search-side maintenance step built around the recent Stockfish qsearch patch line for simplified stalemate detection. This release should therefore be read differently from the previous NNUE-centred update: it does not introduce a new NNUE architecture, new default nets or a new identity model, but instead ports a small and concrete upstream search correction in a controlled way. What changed…  - [StockfishJRC- 1.60-090426](https://ijccrl.com/stockfishjrc-1-60-090426/): StockfishJRC-100426 — Official IJCCRL Release Stockfish-derived • SFNNv14 port • New default NNUE pair • FullThreats expansion • qsearch TT fix 🏆 IJCCRL Verified StockfishJRC-100426 is the new IJCCRL verified maintenance release for the StockfishJRC line. Unlike StockfishJRC-240326, which was intentionally confined to a single-file search-side protocol/output correction, this release is a broader but still disciplined upstream maintenance sync. Its core purpose is to bring the engine onto the newer SFNNv14 NNUE line, align the default network pair with the current upstream snapshot, update the relevant FullThreats / pawn-threat infrastructure, and integrate the latest upstream qsearch transposition-table fix. How this release…  - [Deepalienist-4.0-060426](https://ijccrl.com/deepalienist-4-0-060426/): Deepalienist-4.0-060426 — Official IJCCRL Release Stockfish-derived • Official SFNNv14 NNUE architecture update • Net nn-7bf13f9655c8.nnue • Canonical lowercase ISA identity 🏆 IJCCRL Verified Deepalienist-4.0-060426 supersedes Deepalienist-3.90-310326 as the current IJCCRL verified build. Whereas 3.90 was a deliberately narrow maintenance release centred on NNUE temporary-buffer lifetime and initialisation discipline, 4.0 is a more substantial but still tightly scoped NNUE architecture update. The present release integrates the official Stockfish SFNNv14 NNUE architecture change together with the updated big net nn-7bf13f9655c8.nnue, and closes the release line with deterministic lowercase ISA naming across both the executable filename and the UCI engine identity. What changed in…  - [brainlearnjrc-2.0-030326](https://ijccrl.com/brainlearnjrc-2-0-030326/): Brainlearnjrc-2.00-070426 — Official IJCCRL Release Official SFNNv14 sync • New validated big net • Pawn-push threat indexing update • Deterministic hyphenated CPU builds • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-2.00-070426 supersedes Brainlearnjrc-1.90-110326 as the current IJCCRL verified build. If 1.90 was the release that completed the previous official big/small NNUE transition, the upstream AVX512 threat-fix sync, and the deterministic hyphenated per-CPU identity model, then 2.00 is the release that moves the fork to the next real upstream NNUE step: the official Stockfish SFNNv14 architecture with the new validated big net nn-7bf13f9655c8.nnue, together with the corresponding pawn-push threat indexing logic…  - [Revolution-5.20-040426](https://ijccrl.com/revolution-5-20-040426/): Revolution-5.20-040426 — Official IJCCRL Release Stockfish-derived • SFNNv14 NNUE architecture update • FullThreats expansion • Deterministic per-ISA EXE/UCI identity • Explicit FMA3 support 🏆 IJCCRL Verified Revolution-5.20-040426 is the current IJCCRL-maintained Stockfish-derived release. Relative to the previous public line, Revolution-5.10-090326, the present version introduces a manual port of the official Stockfish SFNNv14 NNUE architecture update, updates the default neural-network files, expands the FullThreats feature space, and formalises a deterministic ISA-specific identity scheme at both executable and UCI level. The release is therefore not a cosmetic rebrand: it combines a real upstream NNUE semantic update with a cleaner and more auditable packaging…  - [recklessjrc-020426](https://ijccrl.com/recklessjrc-020426/): recklessjrc-020426 — Official IJCCRL Derivative Release Reckless-derived • Ivy Bridge-oriented SSE4.1 + POPCNT build • Deterministic EXE/UCI identity • Operational Polyglot BIN opening-book support 🏆 IJCCRL Verified recklessjrc-020426 is an IJCCRL-maintained derivative release based on Reckless. The present release has two principal objectives. First, it introduces a deterministic SSE4.1 + POPCNT build line intended for Ivy Bridge-class hardware, where that instruction profile remains the correct practical target. Second, it integrates a native opening-book path for Polyglot .bin books, together with UCI-level book-slot management and runtime probing before normal search. The release does not claim to be the original Reckless engine; it…  - [StockfishJRC- 1.60-310326](https://ijccrl.com/stockfishjrc-1-60-310326/): StockfishJRC-1.60-310326 — Official IJCCRL Release Stockfish-derived • NNUE stack-local buffer path • Narrow ac_sqr_0_out initialisation • Deterministic per-ARCH EXE/UCI identity preserved 🏆 IJCCRL Verified StockfishJRC-1.60-310326 supersedes StockfishJRC-1.50-240326 as the current IJCCRL verified build. Whereas 1.50 focused on a narrow UCI ponder / final PV coherence maintenance patch in src/search.cpp, 1.60 is a deliberately narrow NNUE maintenance release. It applies the same low-level patch now carried across the current IJCCRL engine line: the temporary NNUE inference buffer is moved from persistent thread_local storage to a stack-local buffer, and constructor initialisation is narrowed from a whole-structure memset to the exact intermediate region that…  - [Deepalienist-3.90-310326](https://ijccrl.com/deepalienist-3-90-310326/): Deepalienist-3.90-310326 — Official IJCCRL Release Stockfish-derived • NNUE stack-local buffer path • Narrow ac_sqr_0_out initialisation • Canonical experience.exp preserved 🏆 IJCCRL Verified Deepalienist-3.90-310326 supersedes Deepalienist-3.80-190326 as the current IJCCRL verified build. Whereas 3.80 focused on the Playchess/Syzygy/UCI bestmove latency fix, root-tablebase gating for infinite and ponder, atomic bestmove delivery, and the restoration of the canonical default learning file experience.exp, 3.90 is a deliberately narrow NNUE maintenance release. It applies the same low-level patch already integrated into the current Wordfish line: the temporary NNUE inference buffer is moved from persistent thread_local storage to a stack-local buffer, and constructor initialisation is narrowed from…  - [Wordfish-4.60-310326](https://ijccrl.com/wordfish-4-60-310326/): Wordfish-4.60-310326 — Official IJCCRL Release Stockfish-derived • NNUE stack-local buffer path • Narrow ac_sqr_0_out initialisation • Deterministic per-ARCH EXE/UCI identity preserved 🏆 IJCCRL Verified Wordfish-4.60-310326 supersedes Wordfish-4.50-190326 as the current IJCCRL verified build. Whereas 4.50 was a targeted operational maintenance release focused on Playchess/Syzygy/UCI bestmove latency hardening, 4.60 is a deliberately narrow low-level NNUE maintenance update: it replaces the persistent thread_local temporary inference buffer with a stack-local buffer in the NNUE propagation path, and narrows the constructor initialisation from a whole-structure memset to the exact intermediate region that must be deterministically pre-cleared, namely ac_sqr_0_out. What changed in Wordfish 4.60 (vs 4.50)…  - [StockfishJRC- 1.50-240326](https://ijccrl.com/stockfishjrc-1-50-240326/): StockfishJRC-240326 — Official IJCCRL Release Stockfish-derived • UCI ponder / final PV alignment • Aborted-search PV coherence • Draw-safe TT ponder extraction 🏆 IJCCRL Verified StockfishJRC-240326 is the new IJCCRL verified maintenance release for the StockfishJRC line. This update is a narrow protocol-consistency patch based on the logic of the upstream Stockfish PR #6679, ported surgically into src/search.cpp. The purpose of the release is not to introduce a speculative strength change, a new NNUE transition, or a broad engine rewrite, but to ensure that the final GUI-visible PV and the emitted ponder remain properly aligned under the relevant UCI output paths.…  - [IJCCR Database Chess Program](https://ijccrl.com/ijccr-database-chess-program/): How to Build a Native Windows Chess Database Creating a modern chess database program for Windows no longer requires choosing between a heavy legacy desktop stack and a weak browser-only interface. Today, it is entirely practical to build a native-feeling Windows application with a web frontend and a systems-level backend, combining the development speed of React and TypeScript with the performance, packaging, and operating-system access provided by Rust and Tauri. That combination is especially well suited to a chess database application, because such a program must handle structured data, local files, game indexing, engine integration, diagnostics, and a desktop user experience…  - [Deepalienist Experience Optimisation Roadmap ](https://ijccrl.com/deepalienist-experience-optimisation-roadmap/): IJCCRL • Deepalienist • R&D Roadmap 2026 Deepalienist Experience Optimisation Roadmap — A Safer, Measurable Plan for experience.exp We are opening a focused development track around one of the most interesting practical layers in a modern Stockfish-derived engine: the experience file. The goal is simple to describe and difficult to do properly: improve how Deepalienist reads, evaluates and reuses accumulated experience without breaking source stability, compatibility or default playing behaviour. This is not a marketing shortcut or an instant Elo promise. It is a disciplined roadmap built around measurement first, engine safety first, and transparent experimentation only after the data is…  - [I SE Classical Cup IJCCRL 2026](https://ijccrl.com/i-se-classical-cup-ijccrl-2026/): IJCCRL • Classical 30+2 • 2026 I SE Classical Cup IJCCRL 2026 — Regular Phase in Progress The regular phase of the I SE Classical Cup IJCCRL 2026 is now underway. The event is being run as a round-robin under the classical control of 30 minutes plus 2 seconds increment. Pairings, standings and published games are being built from the full scheduled phase rather than from isolated exhibition matches. LIVE EVENT Format: Round-robin Time control: 1800s + 2s Planned colour balance tracked Regular phase ongoing Event structure Tournament I SE Classical Cup IJCCRL 2026 Phase Regular phase Format Round-robin Clock 30m…  - [Deepalienist-3.80-190326](https://ijccrl.com/deepalienist-3-80-190326/): Deepalienist-3.80-190326 — Official IJCCRL Release Stockfish-derived • Playchess/Syzygy latency hardening • Root-TB gate for infinite/ponder • Atomic bestmove output • Canonical experience.exp restored 🏆 IJCCRL Verified Deepalienist-3.80-190326 supersedes Deepalienist-3.70-100326 as the current IJCCRL verified build. Whereas 3.70 focused on the official Stockfish big/small NNUE pair, deterministic per-ARCH identity, and the upstream AVX512 threat-fix sync, 3.80 is a targeted operational maintenance release: it applies a narrow but important Playchess/Syzygy/UCI bestmove latency fix, preserves the immediate root-tablebase fast path for normal timed searches, bypasses that shortcut for go infinite and ponder, makes the final bestmove emission fully atomic and synchronised, and restores the…  - [Wordfish-4.50-190326 ](https://ijccrl.com/wordfish-4-50-190326/): Wordfish-4.50-190326 — Official IJCCRL Release Stockfish-derived • Playchess/Syzygy latency hardening • Root-TB gate for infinite/ponder • Atomic bestmove output • Deterministic per-ARCH EXE/UCI identity 🏆 IJCCRL Verified Wordfish-4.50-190326 supersedes Wordfish-4.40-100326 as the current IJCCRL verified build. Whereas 4.40 focused on the official Stockfish big/small NNUE pair, deterministic per-ARCH identity, and the upstream AVX512 threat-fix sync, 4.50 is a targeted operational maintenance release: it applies a narrow but important Playchess/Syzygy/UCI bestmove latency fix, preserves the immediate root-tablebase fast path for normal timed searches, bypasses that shortcut for go infinite and ponder, and makes the final bestmove emission fully atomic and synchronised. What…  - [IJCCRL PGN Graph Beta — Engine Report & Workbook Export](https://ijccrl.com/ijccrl-pgn-graph-beta-engine-report-workbook-export/): IJCCRL • Windows App • PGN Graph Beta IJCCRL PGN Graph Beta — Engine Report & Workbook Export Release The current IJCCRL PGN Graph build moves beyond basic match plotting and introduces a more practical engine-centric reporting workflow. Users can now load a PGN database, inspect a selected engine, generate publication-ready graphs, and export a structured Excel workbook (.xlsx) with the report table and the graphs embedded in the same file. The goal of this phase is simple: a tool that users can operate directly for tournament work without depending on external assistance. Windows beta validated Engine report workflow PNG /…  - [On Opening Methodology, UHO](https://ijccrl.com/on-opening-methodology-uho/): IJCCRL Note On Opening Methodology, UHO, and Fair Reading of Results A respectful clarification on testing philosophy, interpretation of data, and the role of UHO-style books in modern engine testing. We would like to make one point clear in a calm and respectful way: our work is not directed against anyone. The purpose of IJCCRL is to promote computer chess, contribute useful material to the community, and offer a native double broadcast format that simply did not exist in this form before. For that reason, we do not see any value in turning methodological disagreement into personal disagreement. Different tournament organisers,…  - [ShashChessJRC-1.20-170326 ](https://ijccrl.com/shashchessjrc-1-20-170326/): ShashChessJRC-1.20-170326 — Lifetime Refresh (Clean competitive path + robust experience handling) Stable Stockfish-core route • Healthy analysis speed and practical NPS • Experience file created and persisted beside the executable • Leaner architecture for GUI and UCI use 🔒 Lifetime Download ShashChessJRC-1.20-170326 is the first line in this branch that not only preserves the singular identity of the project, but also analyses properly, reaches practical NPS levels in line with the rest of our engine ecosystem, and handles its experience file as expected in real GUI workflows. The result is a cleaner and more reliable engine path for Fritz, CuteChess and…  - [IJCCRL PGN Graph v3.2 — Match-Centric Release](https://ijccrl.com/ijccrl-pgn-graph-v3-2-match-centric-release/): IJCCRL • Windows App • PGN Graph v3.2 IJCCRL PGN Graph v3.2 — Match-Centric Release The new IJCCRL PGN Graph release moves the workflow from a loose player/opponent selector to a match/session-centric model. In practice, this means the application now works closer to how serious chess PGN databases are actually structured: by real sessions, real time controls, and real match blocks. The executable has also been placed in the root directory of the app for easier access. Portable Windows build available Match/session workflow Main / cumulative / colour views Root EXE placement Platform Windows 10/11 Current delivery Portable EXE Core focus…  - [I SE BLITZ IJCCRL 2026 derived stockfish](https://ijccrl.com/i-se-blitz-ijccrl-2026-derived-stockfish/): IJCCRL • Derived Stockfish Engines • Blitz 300+2 I SE BLITZ IJCCRL — Regular Phase Audit Snapshot The event is still in progress, so this is not a final audit pass. What is already verifiable is the currently published segment: the live pack is structurally clean so far, mirrored pairings remain intact, colour balance is exact for every engine, and termination plus tablebase evidence are present in the published games. Final completion control remains open until the full regular phase is finished. AUDIT STATUS: IN PROGRESS 256 / 480 games published 16 engines 32 games per engine 53.3% completed Current audit…  - [Shashchessjrc1.0-110326](https://ijccrl.com/shashchessjrc1-0-110326/): ShashChessJRC-1.0-110326 — Lifetime Release (Stockfish-core + Learning/Book Restore) Clean Stockfish-core base • Persisted learning restored • CTG/BIN opening-book support • Slow Mover restored • ISA-tagged binaries for Fritz/CuteChess 🔒 Lifetime Download This release repositions ShashChessJRC as a clean, fast Stockfish-core engine for IJCCRL users, while restoring only the practical features most requested by GUI users: persisted learning, CTG/BIN opening-book support, and Slow Mover. Heavy legacy layers such as MCTS, Shashin-style behavioural logic and other fork overhead were intentionally left out to keep the engine closer to upstream Stockfish in speed, depth growth and maintenance. What is the key change in 1.0-110326?…  - [brainlearnjrc-1.90-110326](https://ijccrl.com/brainlearnjrc-1-90-110326/): Brainlearnjrc-1.90-110326 — Official IJCCRL Release Official NNUE pair validated • Upstream AVX512 threat-fix sync • Deterministic hyphenated CPU builds • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-1.90-110326 supersedes Brainlearnjrc-1.70-030326 as the current IJCCRL verified build. If 1.70 was mainly about real-GUI smoothness — stable depth progression, calmer evaluation, and cleaner NNUE startup — then 1.90 is the release that brings the fork up to the current official Stockfish big/small NNUE pair, adds the latest upstream AVX512 threat-fix sync, and hardens the per-architecture identity model so the executable name and GUI-visible UCI name stay aligned. What changed in 1.90 (vs 1.70)…  - [LesChats bin book V.110326](https://ijccrl.com/leschats-bin-book-v-110326/): LesChats-110326 — Official IJCCRL Opening Book Release CTG opening book (Fritz GUI) • audited database expansion • deeper opening lines • broader practical coverage 📚 IJCCRL Verified LesChats-110326 is the new incremental update of the IJCCRL opening book for Fritz-compatible CTG workflows. This release follows the same controlled-maintenance philosophy as our latest book updates: expanding the audited reference base, increasing practical opening coverage, and reinforcing the playable surface with more depth and more reliable move selection for tournament use. Release facts (at a glance) Version update: from LesChats-220226 to LesChats-110326. Audited expansion: the new build incorporates additional games from the latest…  - [Africaata bin book v.110326](https://ijccrl.com/africaata-bin-book-v-110326/): Africaata Bin Book v.110326 — Official IJCCRL Update Audited accepted-game ingestion • Wider ECO coverage • More opening lines and deeper practical book paths 📘 Book update Relative to the previous December 2025 edition, Africaata Bin Book v.110326 has been rebuilt with a new audited intake drawn from the attached accepted-game database. The update adds a substantial body of practical material and expands the book in both breadth and depth, reinforcing early move coverage, increasing the number of playable branches, and extending the continuity of many lines beyond the previous release. 624 audited games added 553 / 71 White wins /…  - [Deepalienist-3.70-110326](https://ijccrl.com/deepalienist-3-70-110326/): Deepalienist-3.70-100326 — Official IJCCRL Release Stockfish-derived • Real official NNUE pair validated end-to-end • Upstream threat-fix sync • Deterministic per-ARCH EXE/UCI identity 🏆 IJCCRL Verified Deepalienist-3.70-100326 supersedes Deepalienist-3.60-010326 as the current IJCCRL verified build. Whereas 3.60 already represented a strong Stockfish-derived tournament build, 3.70 advances the fork in three practical directions at once: it adopts the current official Stockfish big/small NNUE pair, preserves a deterministic per-architecture EXE/UCI identity for GUI clarity, and integrates the latest upstream fix “Fix avx512icl update_piece_threats bug”. What changed in Deepalienist 3.70 (vs 3.60) Official Stockfish NNUE pair updated and validated for real: Deepalienist now uses the…  - [Wordfish-4.40-100326](https://ijccrl.com/wordfish-4-40-100326/): Wordfish-4.40-100326 — Official IJCCRL Release Stockfish-derived • Real official NNUE pair validated end-to-end • Upstream threat-fix sync • Deterministic per-ARCH EXE/UCI identity 🏆 IJCCRL Verified Wordfish-4.40-100326 supersedes Wordfish-4.30-030326 as the current IJCCRL verified build. Whereas 4.30 focused mainly on distribution hygiene (deterministic per-ARCH identity for GUIs, cleaner UCI output, and smoother NNUE handling), 4.40 is a more substantive maintenance release: it moves Wordfish to the current official Stockfish big/small NNUE pair, keeps the deterministic per-architecture naming model, and integrates the latest upstream fix “Fix avx512icl update_piece_threats bug”. What changed in Wordfish 4.40 (vs 4.30) Official Stockfish NNUE pair updated and validated…  - [I Season Blitz IJCCRL UCI Engines](https://ijccrl.com/i-season-blitz-ijccrl-uci-engines/): I Season Blitz IJCCRL Live Arena — Original UCI Engines Interim technical note based on the current published snapshot. This post is informational only and should not be interpreted as a final audit validation. Status: event in progress. Published games: 137 / 224. Current completion: 61.2%. Next pending pairing in scheduler: PlentyChess 7.0.1 vs Berserk 13. The current archive reflects an active tournament rather than a closed event. For that reason, the table below should be read as a live classification snapshot. It is useful for tracking the current order of the field, but it is not a final audited standing.…  - [Africaata ctg update v.09032026](https://ijccrl.com/africaata-ctg-update-v-09032026/): Africaata CTG Opening Book 2026 (090326) — Accepted Decisive Learning Refresh Incremental CTG update based on the newly supplied accepted learning database and a refreshed decisive-game training pass What Changed vs. 270226 Release The learning layer has been refreshed from the newly supplied accepted database, preserving the decisive-only methodology. Total accepted sample audited for this update: 624 games. Result split of the accepted input: 553 White-win games and 71 Black-win games. Coverage window of the supplied learning material: 02/03/2025 → 05/03/2026. Duplicate check on the supplied accepted files: no duplicate GameId detected across the audited input. Audited Learning Input Used in…  - [Revolution-5.10-090326](https://ijccrl.com/revolution-5-10-090326/): Revolution-5.10-090326 — IJCCRL Validation Update Stockfish-derived • Upstream backport for AVX512 ICL threat handling • Local certainty-grade validation on SSE41POPCNT 🧪 IJCCRL Validated Revolution-5.10-090326 is the next validated IJCCRL update after Revolution-5.0-030326. This revision is intentionally narrow in scope: it does not introduce a broad search rewrite or a cosmetic churn pass. Instead, it integrates a small upstream bug-fix backport related to update_piece_threats(), extends the internal benchmark set with a new regression-catching position, and confirms that the patched tree remains stable in a real local build-and-run workflow. What changed from 5.0-030326 to 5.10-090326 Upstream bug-fix backport for AVX512 ICL threat handling:…  - [IJCCRL VIP PGN Database 090326](https://ijccrl.com/ijccrl-vip-pgn-database-090326/): IJCCRL VIP PGN Database — Lifetime Update (09/03/2026) Lifetime Members • Audited master PGN • 50,503 games • 01/04/2024 → 09/03/2026 • Playchess-centred archive 🏆 IJCCRL Audited This update supersedes the previous VIP PGN database announcement for this package. The audited ZIP currently delivers a single consolidated file, africaata2025.pgn, and the verified structural count for this snapshot is 50,503 games. The real coverage window of the archive is 01 April 2024 → 09 March 2026. Accordingly, this block corrects the earlier wording that referred to a smaller total and to split PGN subsets being included in the package. What’s new in…  - [ShashChessjrc-1.0-070326](https://ijccrl.com/shashchessjrc-1-0-070326/): ShashChessjrc-1.0-070326 — IJCCRL Release A new IJCCRL-maintained derivative engine focused on a real technical upgrade rather than a cosmetic fork: SFNNv13-compatible NNUE integration, runtime validation with the newer nets, and a clean SSE41-POPCNT Clang build path. NEW • IJCCRL Release overview ShashChessjrc-1.0-070326 is not presented as a simple clone or superficial rebrand. This release involved a technically demanding integration process to bring the engine to the newer SFNNv13-compatible NNUE state, align the big-network defaults with the updated architecture, and resolve build/runtime issues that previously prevented a clean end-to-end validation. The result is a working binary that compiles successfully with our real…  - [Tool pgn to graph](https://ijccrl.com/tool-pgn-to-graph/): IJCCRL PGN to Graph v2 — Visual PGN Analysis for Windows A practical Windows tool that converts a PGN database into clear Elo progression graphs, adds a time-control line, and allows head-to-head comparison between a main engine/player and a selected opponent. Built for serious chess-engine workflows, but simple enough for everyday use. Windows • v2 What this application does IJCCRL PGN to Graph v2 reads a PGN database and turns raw results into a visual history. Instead of scanning dozens or hundreds of headers line by line, you can see the trend immediately: how a given engine or player evolves across…  - [IJCCRL PGN Tools v1.0](https://ijccrl.com/ijccrl-pgn-tools-v1-0/): IJCCRL PGN Tools v1.1 — Lifetime Members Release Portable Windows toolkit to clean and audit PGN databases: split by result and move range, compute ratings with ORDO and BayesElo, and generate a daily Playchess report (W/D/L, opponents, ECO, decisive games). VIP • Lifetime Only Download access (Lifetime Members) This release is available inside our members-only area. Please log into your IJCCRL account and open the “Lifetime Downloads” section to access the package. Package name: IJCCRL_PGN_Tools_v1.1_2026-03-07.zip Platform: Windows 10/11 (portable — no Python required to run the EXE) Author (IJCCRL wrapper/app): Jorge Ruiz Centelles ⬇️ Download (Lifetime Area) 📄 Licences Tip: keep…  - [How to Compile Viridithas on Windows](https://ijccrl.com/how-to-compile-viridithas-on-windows/): How to Compile Viridithas on Windows (PowerShell + MSYS2/Clang) — Step-by-Step Viridithas is a high-performance Rust UCI engine. This tutorial shows a clean, repeatable Windows pipeline: prepare MSYS2 for Clang + libclang, clone from an MSYS2 clang shell, then build from PowerShell with syzygy and bindgen enabled (including RUSTFLAGS="-C target-cpu=native"). IJCCRL • Publish-ready Scope: Windows + PowerShell build, with MSYS2 providing clang and libclang.dll for Syzygy (Fathom) and bindgen. The steps below focus on reproducibility and minimal friction for tournament operators. 1) What you are building (and why the toolchain matters) 1.1 Rust version requirement Viridithas declares a minimum Rust toolchain…  - [Match 1 — Artemis vs RapTora — Audit PASS](https://ijccrl.com/match-1-artemis-vs-raptora-audit-pass/): IJCCRL Audit Report — Match 1 (M1) Audit scope: PGN completeness • deterministic pairing integrity • duplicate detection (D1/D2) • colour balance • termination & tablebase evidence. ✅ AUDIT PASS • 2026-03-03 Match M1 — Artemis 26.1TR_PrO vs RapTora Result Winner: Artemis • Score: 59.5 – 40.5 Games 100 total • 50 openings × 2 mirrored legs Event tag (internal) IJCCRL Derived Arena S1 — Playoffs (Top-8) — M1 Track: BUL1202-DERIVED TC: 120s+2s TB: Syzygy 1–6 Type: Playoffs Dataset: games.pgn + results.json + scheduler_state.json What “Audit PASS” means Complete PGN with final results for all games (no unfinished games published). Deterministic…  - [Vip database 030326](https://ijccrl.com/vip-database-030326/): IJCCRL VIP PGN Database — Lifetime Update (03/03/2026) Lifetime Members • Playchess verified games • Clean PGN sets + CBH-ready formatting • 49,905 games (01/01/2025 → 03/03/2026) 🏆 IJCCRL Verified This update supersedes the previous VIP PGN database refresh. The earlier release focused on incremental additions, a 1-year margin filter (planned to be expanded for 2026), general .pgn cleaning, and CBH formatting for ChessBase compatibility. Today’s update is different in scope: it consolidates all verified Playchess games produced by my own engines, running on my own hardware, into clean, purpose-built PGN datasets designed for fast analysis and reuse. What’s new in…  - [Wordfish-4.30-030326](https://ijccrl.com/wordfish-4-30-030326/): Wordfish-4.30-030326 — Official IJCCRL Release Stockfish-derived • Deterministic per-ARCH EXE/UCI identity • NNUE verification cache + warmup • Upstream sync (no-functional) 🏆 IJCCRL Verified Wordfish-4.30-030326 supersedes Wordfish-4.20-230226 as the current IJCCRL verified build. The previous release was primarily an SFNNv13 integration milestone (SFNNv11 → SFNNv13) with a strong emphasis on Windows/MSYS2 reliability and deterministic smoke tests. This release is different in scope: it focuses on distribution hygiene (GUIs must “see” the right engine), UCI output cleanliness, and smoother NNUE handling during analysis and tournament operation. What changed in Wordfish 4.30 (vs 4.20) Deterministic EXE + UCI identity per architecture (GUI-friendly): each…  - [Revolution-5.0-030326](https://ijccrl.com/revolution-5-0-030326/): Revolution-5.0-030326 — Official IJCCRL Release Stockfish-derived • Simplified attackers_to_exist (upstream-aligned) • Full rebrand + architecture-tagged UCI identity 🏆 IJCCRL Verified Revolution-5.0-030326 is the new IJCCRL production build, superseding Revolution-4.90-210226. This release is deliberately focused on two practical, user-visible objectives: (1) a small upstream-aligned search micro-optimisation, and (2) a clean, distribution-grade rebrand that makes every executable and every GUI entry unambiguous by instruction set. What changed from 4.90-210226 to 5.0-030326 Upstream-aligned simplification: attackers_to_exist(): the internal attacker-existence probe was rewritten to use a direct set of occupied-aware checks (rook/queen, bishop/queen, pawn, knight, king). This is a targeted code simplification that removes redundant pre-check…  - [brainlearnjrc-1.70-030326](https://ijccrl.com/brainlearnjrc-1-70-030326/): Brainlearnjrc-1.70-030326 — Official IJCCRL Release Smooth NNUE startup • Stable depth/eval (no “jumps”) • Deterministic CPU builds • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-1.70-030326 is a corrective performance-and-stability release aimed at one practical outcome: analysis that feels “smooth” in real GUIs. In Fritz 20 and similar front-ends, the engine now climbs depth quickly and steadily (CCC-style), while evaluation remains stable on positions where earlier builds could show visible stalls or abrupt jumps. What was fixed in 1.70 (030326) Pre-search NNUE warmup (no late-init stalls): NNUE replicas are forced before iterative deepening begins, preventing first-PV delays and avoiding the “startup…  - [Deepalienist-3.60-010326](https://ijccrl.com/deepalienist-3-60-010326/): Deepalienist-3.60-010326 — Official IJCCRL Release Stockfish-derived • True PGO (clang/MSYS2) • Higher NPS • NNUE stability: no fallbacks / no missing-net traps 🏆 IJCCRL Verified Deepalienist-3.60-010326 is a corrective, performance-focused follow-up to 3.50-270226. The goal of this release is operational certainty: PGO is real (profile-use, not “PGO-like”), NPS increases measurably in practice, and the SFNNv13 NNUE stack runs cleanly without runtime fallbacks, silent net swaps, or missing-net edge cases. What’s fixed vs 3.50-270226 True PGO pipeline enforced: the build flow now cleanly separates profile-generate (GEN) from profile-use (USE) so the final binary is a genuine PGO executable. No accidental non-PGO releases:…  - [How to Compile Chess Engines PGO](https://ijccrl.com/how-to-compile-chess-engines-pgo/): Why this matters for chess engines (and why “PGO” is often misunderstood) If you compile chess engines regularly, you already know the basics: pick the right ARCH, build in release mode, and run bench to sanity-check speed. PGO takes the next step: it uses runtime execution data to guide compiler decisions (branch prediction hints, inlining choices, code layout, and other heuristics) so the “hot” paths of the engine become faster. The catch is that many people believe they have built “with PGO” simply because they enabled a flag—or they ran a build target named profile-build—without confirming that: This article shows a…  - [brainlearnjrc-1.60-010326](https://ijccrl.com/brainlearnjrc-1-60-010326/): BrainlearnJRC-1.60-010326 — Official IJCCRL Release BrainLearn Experience (official) • Stable search/eval/depth • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified BrainlearnJRC-1.60-010326 is an IJCCRL corrective engineering release focused on two practical goals: (1) validated, official BrainLearn Experience usage (read/write works reliably in real GUIs and long sessions), and (2) stable, efficient search behaviour where reported depth and evaluation progress smoothly without erratic jumps, resets, or “fallback-like” behaviour. What was fixed in 1.60 (010326) BrainLearn Experience (official) — validated in practice: Experience is now handled in the intended BrainLearn way: the engine reliably opens, reads, and updates the Experience file during analysis and…  - [IJCCRL Elite Arena — Bullet 120+2 Season 1](https://ijccrl.com/ijccrl-elite-arena-bullet-1202-season-1/): IJCCRL Elite Arena — Bullet 120+2 (Original UCI) • Season 1 Official run using upstream/original UCI engines (no IJCCRL forks). Regular Season is a full Round Robin designed for fair, auditable Elo. LIVE SEASON KICKOFF • Today 17:00 (Europe/Madrid) 🏆 IJCCRL Verified Format ⏱ 120s + 2s Format overview Regular Season Top-12 Round Robin • 25 rounds/openings ⇒ 50 games/engine (25W + 25B) Qualifies Top-8 advance to the next stage Top-8 Stage Round Robin among the eight qualifiers (seeding + tie-breaks) Finals Semifinals: #1 vs #4 and #2 vs #3 • Final: 100 games (50W + 50B) Annual rating policy: Elo…  - [brainlearnjrc-1.50-270226](https://ijccrl.com/brainlearnjrc-1-50-270226/): BrainlearnJRC-1.50-270226 — Official IJCCRL Release Stockfish-derived • SFNNv13 NNUE alignment • Deterministic UCI/EXE naming • IJCCRL Verified 🏆 IJCCRL Verified BrainlearnJRC-1.50-270226 is an IJCCRL engineering release that completes a full SFNNv13 NNUE alignment: it updates the default BIG network, matches the expected NNUE architecture parameters, and synchronises the FullThreats feature layout used during SFNNv13 training. In addition, the build system now keeps deterministic engine naming even on modern CPUs where ARCH=native resolves to newer ISA targets (e.g. AVX-512 ICL). What’s new in 1.50 (270226) SFNNv13 default BIG NNUE: the engine now defaults to nn-5227780996d3.nnue for the BIG net (SMALL remains nn-37f18f62d772.nnue).…  - [Deepalienist-3.50-270226](https://ijccrl.com/deepalienist-3-50-270226/): Deepalienist-3.50-270226 — Official IJCCRL Release Stockfish-derived • SFNNv13 consolidated • No NNUE fallbacks • Smoother analysis stream (IJCCRL options) 🏆 IJCCRL Verified Deepalienist-3.50-270226 is a stability-focused follow-up to 3.40. It preserves the SFNNv13 evaluation stack while correcting the real-world issues reported in 3.40: missing-net traps, fallback-like behaviour in some environments, and non-smooth analysis updates in GUIs and broadcast workflows. What’s improved vs 3.40 SFNNv13 defaults locked and verified: EvalFile = nn-5227780996d3.nnue, EvalFileSmall = nn-37f18f62d772.nnue, and L2Big = 31 (L2=32). Build/runtime robustness: the net staging path is hardened so PGO/bench and regular runs do not start without the required networks present in…  - [Africaata ctg update v.27022026](https://ijccrl.com/africaata-ctg-update-v-27022026/): Africaata 2026 (270226) — Dataset Expansion & Learning Refinement Incremental release focused on controlled learning input (White wins + Black wins) What Changed vs. 170226 Release New PGN files added to the learning pipeline: Eval filter – Accepted – White Win Eval filter – Accepted – Black Win The previous release was based on an audited wins-only dataset up to December 2025. This version incorporates an additional filtered layer of decisive games, separated by result and revalidated before integration. No structural change to depth policy or book format — this is a controlled dataset augmentation. Learning Methodology (Current Version) Wins-only reinforcement:…  - [BUL 120+2 (Derived) TEST 002](https://ijccrl.com/bul-1202-derived-test-002/): BUL 120+2 (Derived) — TEST 002 — Audit + Downloads Summary for IJCCRL-BUL1202-DERIVED-TEST-002-20260225.pgn (240 games • 16 engines • 30 games/engine). 🏆 ALL CHECKS: PASS Track: BUL1202-DERIVED TC: 120s+2s Type: TEST Test #: 002 Date: 20260225 TB avg: 394,059 TB median: 285,495 TB max: 3,193,725 ⬇️ Download IJCCRL-BUL1202-DERIVED-TEST-002-20260225.zip Previous test (001) ZIP includes PGN bundle + audit artefacts (audit_report.json / audit_report.txt). Audit checklist Complete PGN with final results (no unfinished games): PASS Deterministic pairing integrity (cycle/pairIndex/pairGameNo unique; mirror swap verified): PASS No duplicate games detected (D1/D2 fingerprints): PASS Colour balance per engine verified: PASS Termination + TB evidence recorded in PGN…  - [Provisional Standings (Original UCI Engines)](https://ijccrl.com/provisional-standings-original-uci-engines/): IJCCRL Elite Arena S1 — Original UCI Engines (Provisional Audit & Standings) Round-robin in progress • Bullet 120+2 • Syzygy TB 16 • Snapshot from games.pgn + results.json. Games: 61 Engines: 12 Elo anchor: 3700 (mean) 🏆 Audit-grade snapshot Provisional Classification + Elo (mean = 3700) # Engine Pts GP W-D-L W/B Elo* 1 Obsidian 16.0 9.5 12 8-3-1 6/6 3731.5 2 Stockfish dev-20260218-a6d055d7 7.0 10 5-4-1 5/5 3719.0 3 Caissa 1.24 AVX2 6.5 10 3-7-0 5/5 3714.3 4 PlentyChess 7.0.55 6.0 12 4-4-4 6/6 3701.9 5 Berserk 13 6.0 10 3-6-1 5/5 3708.8 6 Viridithas 19.0.1 5.5 10 3-5-2 5/5…  - [Wordfish-4.20-230226](https://ijccrl.com/wordfish-4-20-230226/): Wordfish-4.20-230226 — Official IJCCRL Release Stockfish-derived • SFNNv13 upgrade (from SFNNv11) • Windows/MSYS2 NNUE reliability + deterministic, audit-grade build 🏆 IJCCRL Verified Wordfish-4.20-230226 supersedes the previous IJCCRL Wordfish build as the current verified release. The engineering objective for this version was clear and non-negotiable: migrate the engine from SFNNv11 to SFNNv13 while preserving determinism, reproducibility, and real-host reliability on Windows/MSYS2. In practice, this meant aligning not only the networks, but the entire NNUE integration surface until compile → PGO → bench became stable again. What changed in Wordfish 4.20 (SFNNv11 → SFNNv13) SFNNv13 end-to-end compatibility: Wordfish is now aligned with the…  - [LesChats bin book opening 220226](https://ijccrl.com/leschats-bin-book-opening-220226/): LesChats-220226 — Official IJCCRL Opening Book Release CTG opening book (Fritz GUI) • 400+ audited games added • e4 / d4 maintained at 50/50 📚 IJCCRL Verified LesChats-220226 is a maintenance-and-quality release of the IJCCRL opening book for Fritz-compatible CTG workflows. The primary goal of this update is practical reliability: expanding coverage while actively reducing the probability of “dark” or low-credibility moves entering the playable book surface. Release facts (at a glance) File size updated: from 141340 MB to 141935 MB. Dataset expansion: 400+ audited games were added to strengthen the reference base and reduce noisy or “dark” move artefacts. White…  - [Revolution 4.90 210226](https://ijccrl.com/revolution-4-90-210226/): Revolution-4.90-210226 — Official IJCCRL Release Stockfish-derived • SFNNv13 upgrade (from SFNNv11) • Deterministic, audit-grade build + PGO hardening 🏆 IJCCRL Verified Revolution-4.90-210226 supersedes Revolution-4.80-120226 as the current IJCCRL build. This release is centred on a single, high-impact engineering objective: moving the engine from SFNNv11 to SFNNv13 without breaking determinism, reproducibility, or runtime reliability. In practice, that meant aligning not only the NNUE networks themselves, but the entire NNUE integration surface (features, accumulators, core plumbing, build system, and runtime checks) until profile-build + bench became stable again under real-world constraints. What changed from 4.80 (SFNNv11) to 4.90 (SFNNv13) SFNNv13 end-to-end compatibility: the…  - [StockfishJRC- 1.40-190226](https://ijccrl.com/stockfishjrc-1-40-190226/): StockfishJRC 1.40 — SFNNv13 Integration Release Stockfish-derived engine maintained in the IJCCRL ecosystem. This release is centred on the practical work of integrating SFNNv13: adapting NNUE architecture changes, updating the embedded nets, and hardening the build workflow so the result remains deterministic and auditable. Upstream sync: SFNNv13 roll-in NNUE architecture update Embedded NNUE (no fallbacks) IJCCRL verified build Lifetime Members Overview StockfishJRC 1.40 is not a “single patch” style update. SFNNv13 changes touch multiple layers: the NNUE feature pipeline, accumulator update paths, default net handling, and the build steps that fetch and embed the correct networks for a reproducible executable. No…  - [Deepalienist 3.40 200226](https://ijccrl.com/deepalienist-3-40-200226/): Deepalienist-3.40-200226 — Official IJCCRL Release Stockfish-derived • SFNNv13 NNUE upgrade • Engineering (no clone) • IJCCRL verified change-set 🏆 IJCCRL Verified Deepalienist-3.40-200226 is a major infrastructure update that upgrades the engine to the SFNNv13 evaluation stack — achieved through surgical engineering, not by cloning Stockfish wholesale. The goal was clear: keep Deepalienist’s identity and ecosystem compatibility intact while integrating the new NNUE architecture cleanly and reproducibly. What’s new SFNNv13 NNUE architecture enabled with the correct upstream defaults. New default networks (big + small) aligned with SFNNv13: EvalFile = nn-5227780996d3.nnue and EvalFileSmall = nn-37f18f62d772.nnue. Compatibility fixes added only where required (no engine-wide…  - [Africaata 170226 ctg update](https://ijccrl.com/africaata-170226-ctg-update/): Africaata 2026 (170226) — Opening Book Release (Lifetime Members) Curated & audited learning pipeline • Anti-trojan sanitation • Depth up to 21 moves (42 ply) 🏆 Lifetime Exclusive This is the first Africaata Opening Book update since December 2025. The 2026 (170226) release focuses on one core goal: CLEAN DATA + MANUAL AUDIT + RELIABLE DEPTH. What’s New in 2026 (170226) Audited server games added — verified games played on our server were incorporated after review, preventing “trojan” move pollution. PGN database filtered — the import PGN used for Black wins and White wins was cleaned with Khalid Omar PGN Tools.…  - [StockfishJRC- 1.30-150226](https://ijccrl.com/stockfishjrc-1-30-150226/): StockfishJRC 1.30 — Official IJCCRL Release Stockfish-derived engine maintained in the IJCCRL ecosystem — updated search core with the latest upstream probCutDepth simplification while keeping strict determinism and your verified build profile. Upstream sync: dev-20260213-77d46ff6 Search refinement IJCCRL verified build Lifetime Members Overview StockfishJRC 1.30 is a maintenance and performance-stability release focused on a targeted upstream search adjustment. The goal is to keep the IJCCRL ecosystem aligned with modern Stockfish development while preserving predictable, tournament-grade behaviour. This is a controlled port: only the specific upstream change is integrated (no unrelated refactors or formatting churn). What changed vs the previous StockfishJRC release…  - [BrainlearnJRC-1.40-150226](https://ijccrl.com/brainlearnjrc-1-40-150226/): BrainlearnJRC-1.40-150226 — Official IJCCRL Release Stockfish-derived • Online time safety (lag-aware) • Stockfish-compatible UCI options 🏆 IJCCRL Verified BrainlearnJRC-1.40-150226 is an IJCCRL stability release focused on one practical issue seen in online play: rare time losses caused by network/GUI lag despite correct play. This version updates time management so the engine reserves a fixed overhead buffer before budgeting search time, and introduces a critical-clock emergency policy to avoid flagging under sudden spikes. What’s new in 1.40 (150226) Stockfish-compatible UCI options (names & semantics): options are aligned to upstream conventions so common GUIs behave predictably. Ponder remains a check option, default false.…  - [Shashchessjrc1.0-120226](https://ijccrl.com/shashchessjrc1-0-120226/): ShashChessJRC-1.0-120226 — Lifetime Hotfix (Search/Eval + Build Reliability) ShashChess-derived • SFNNv11-compatible • Embedded NNUE (Big+Small) • Stability + performance pass for IJCCRL production 🔒 Lifetime Download This Lifetime refresh focuses on one goal: make ShashChessJRC behave like a distribution-grade IJCCRL engine — stable depth growth, consistent evaluation, and reliable profile-build builds with embedded NNUE. It preserves the public identity and interfaces of ShashChessJRC, but removes residual overhead and build pitfalls that could impact tournament consistency. Why this update? Early tests showed abnormal depth starts, occasional evaluation jumps, and a lower NPS baseline compared to other IJCCRL engines. This hotfix restores Stockfish-like…  - [revolution 4.80 120226](https://ijccrl.com/revolution-4-80-120226/): Revolution-4.80-120226 — Official IJCCRL Release Stockfish-derived • SFNNv11 compatibility + embedded NNUE validation • Deterministic build audit 🏆 IJCCRL Verified Revolution-4.80-120226 supersedes Revolution-4.70-010126 as the current IJCCRL build. The main focus of this update is to ensure the engine remains fully aligned with the current Stockfish/SFNNv11 NNUE expectations and to provide audit-grade proof that the delivered binaries use embedded NNUE networks (no external network dependencies, no runtime fallbacks). What changed from 4.70 (010126) to 4.80 (120226) SFNNv11 NNUE compatibility ensured: the release is aligned with the current network identifiers expected by modern Stockfish-derived code paths (big + small networks). Embedded-only delivery…  - [Stockfishjrc 1.20 120226](https://ijccrl.com/stockfishjrc-1-20-120226/): StockfishJRC-1.20-120226 — Official IJCCRL Release Stockfish-derived • Upstream sync (Search) • Lifetime Members build 🏆 IJCCRL Verified StockfishJRC-1.20-120226 is now available for IJCCRL Lifetime Members. This update focuses on a clean upstream synchronisation of the search code, keeping the engine aligned with the current Stockfish development line used across the IJCCRL ecosystem. What’s updated in 1.20 (120226) Upstream patch applied (Search history initialisation): Stockfish commit 21b0974 — “Simplify away main history default”. The main-history table is now decayed towards 0 and reset with 0 instead of a baked-in default. This is a simplification/cleanup intended to preserve playing strength while reducing special-case…  - [Wordfish 4.10 120226](https://ijccrl.com/wordfish-4-10-120226/): Wordfish-4.10-120226 — Public IJCCRL Release Stockfish-derived • SFNNv11 main history handling • Public download ✅ IJCCRL Build Wordfish-4.10-120226 is now published as the current public release. This build integrates the latest upstream intent for main history handling: histories now start from zero after a clear, removing the previous hardcoded non-zero baseline and simplifying decay logic. The result is a cleaner, more transparent history signal at game start and after resets, aligned with modern Stockfish behaviour. What’s new in 4.10 (120226) Main history baseline removed: histories no longer rely on a hardcoded non-zero default. Clear() now resets to zero: main history is…  - [BrainlearnJRC-1.30-120226](https://ijccrl.com/brainlearnjrc-1-30-120226/): BrainlearnJRC-1.30-120226 — Official IJCCRL Release Stockfish-derived • SFNNv11 • Embedded NNUE (No fallbacks, Embedded-only verified) 🏆 IJCCRL Verified BrainlearnJRC-1.30-120226 is now available on IJCCRL as a fully verified build aligned with the latest Stockfish NNUE stack. This release integrates the SFNNv11 NNUE architecture and updates the default BIG network to nn-3dd094f3dfcf.nnue, while keeping the SMALL network nn-37f18f62d772.nnue. The result is a lighter threat feature set (no “piece → king” targets) and a cleaner incremental update path — with fully deterministic embedded evaluation. What’s new in 1.30 (120226) Upstream SFNNv11 adoption: threat inputs of the form piece → king are removed, reducing…  - [Deepalienist-3.30-120226](https://ijccrl.com/deepalienist-3-30-120226/): Deepalienist-3.30-120226 — Official IJCCRL Release Stockfish-derived • Search robustness update • IJCCRL verified change-set 🏆 IJCCRL Verified Deepalienist-3.30-120226 is a small, surgical update focused on search state hygiene. The goal is to align the engine’s main-history reset behaviour with upstream intent: when histories are cleared, they should start from zero (not from a hardcoded non-zero default). Motivation Simplify main history handling by removing the hardcoded non-zero default so histories start from zero when cleared, matching the upstream intent to drop mainHistoryDefault. Change (exact) In src/search.cpp, inside Search::Worker::clear(), replace mainHistory.fill(68); with mainHistory.fill(0);. No other changes were introduced in this release. Testing &…  - [StockfishJRC- 1.10-060226](https://ijccrl.com/stockfishjrc-1-10-050226/): StockfishJRC 1.10 (060226) Stockfish 18–derived engine with dual embedded NNUE, dynamic evaluation control, and modernized Polyglot / CTG opening book support. Stockfish 18–derived Dual NNUE embedded Dynamic evaluation IJCCRL verified Overview StockfishJRC 1.10 (060226) is a tournament-grade chess engine developed within the IJCCRL ecosystem. Although derived from Stockfish 18, it is not a simple clone. Codex-driven integration work introduces controlled evaluation extensions and a modernized book subsystem while preserving strict determinism. Dual Embedded NNUE (Verified) Big NNUE: nn-3dd094f3dfcf.nnue (~112 MiB) Small NNUE: nn-37f18f62d772.nnue (~6 MiB) Embedded-only: no external NNUE files required Runtime verification: both networks reported at startup Engine startup confirms:…  - [BrainlearnJRC-1.20-040226](https://ijccrl.com/brainlearnjrc-1-20-040226/): BrainlearnJRC-1.20-040226 — Official IJCCRL Release Stockfish-derived • SFNNv11 • Embedded NNUE (No fallbacks, Embedded-only verified) 🏆 IJCCRL Verified BrainlearnJRC-1.20-040226 is now available on IJCCRL as a fully verified build aligned with the latest Stockfish NNUE stack. This release updates the NNUE architecture to SFNNv11, removing “piece → king” threat features to reduce net size and streamline incremental updates — while keeping evaluations stable in long matches and analysis. What’s new in 1.20 (040226) SFNNv11 NNUE update: threat features targeting the king are removed (upstream SFNNv11), reducing network footprint. BIG NNUE updated and verified: nn-3dd094f3dfcf.nnue loads from <embedded>. SMALL NNUE embedded: nn-37f18f62d772.nnue…  - [Pullfish-3.10-040226](https://ijccrl.com/pullfish-3-10-040226/): Pullfish-3.10-040226 — Official IJCCRL Release Stockfish-derived • Stockfish 18 NNUE (BIG+SMALL) • Embedded-first (no runtime missing nets) 🏆 IJCCRL Verified Pullfish-3.10-040226 is now available on IJCCRL as a fully verified build aligned with the Stockfish 18 NNUE stack. This release is packaged following the IJCCRL workflow: stable defaults, clean builds, and self-contained runtime for tournament use. What’s verified in 3.10 (040226) Stockfish 18 BIG NNUE: default EvalFile is nn-c288c895ea92.nnue (125MiB, (102384, 1024, 15, 32, 1)). Stockfish 18 SMALL NNUE: default EvalFileSmall is nn-37f18f62d772.nnue (6MiB, (22528, 128, 15, 32, 1)). Runtime self-contained: the engine runs and produces bestmove even with zero *.nnue…  - [Deepalienist-3.20-040226](https://ijccrl.com/deepalienist-3-20-040226/): Deepalienist-3.20-040226 — Official IJCCRL Release Stockfish-derived • SFNNv10 (Threat Inputs) • Embedded NNUE (No fallbacks) 🏆 IJCCRL Verified Deepalienist-3.20-040226 is now available on IJCCRL as a fully verified build aligned with the latest Stockfish NNUE stack. This release integrates the SFNNv10 network architecture with Threat Inputs, improving the engine’s ability to “see” threatened pieces more naturally and producing more accurate evaluations in both analysis and long match conditions. What’s new in 3.20 (040226) BIG NNUE fixed and verified: the official Stockfish BIG network nn-c288c895ea92.nnue loads correctly from <embedded> with no transformer mismatches. SMALL NNUE embedded: nn-37f18f62d772.nnue also loads from <embedded>. No…  - [Revolution 4.70-010226](https://ijccrl.com/revolution-4-70-010226/): Revolution 4.70 — Stockfish 18–Aligned Core (SFNNv10, Shared Memory, Search Refinements) Revolution 4.70 is a major update built to stay in lockstep with the latest core advances from :contentReference[oaicite:0]{index=0}. This release focuses on a stronger, more accurate evaluation, higher efficiency for high-concurrency testing, and a refined search that performs better in “tough to convert” positions (fortresses, stalemates, repetition edge cases). Lifetime Members Download Revolution 4.70 is available for IJCCRL Lifetime Members. If you already have access, download it from your members area. If not, consider upgrading to get the full archive of engines, books, and tournament assets. What’s New in Revolution…  - [IJCCRL — StockfishJRC Presentation](https://ijccrl.com/ijccrl-stockfishjrc-presentation/): StockfishJRC — Dynamic Stockfish-Derived Engine (IJCCRL) A technically differentiated Stockfish branch focused on dynamic evaluation, modernized Polyglot book support, and tournament-grade reproducibility. Stockfish-derived Polyglot modernized Dynamic style IJCCRL ecosystem What is StockfishJRC? StockfishJRC is a chess engine developed within the IJCCRL ecosystem. It is based on the Stockfish codebase, but it is not a simple clone. The project introduces architectural and evaluation changes designed to explore a more initiative-driven, less conservative playing philosophy—while keeping the engine stable for long tournament runs. Goal: provide a Stockfish-derived engine with a distinct personality and a clean, reusable feature set that can be shared across…  - [Shashchessjrc — IJCCRL Exclusive Release](https://ijccrl.com/shashchessjrc-ijccrl-exclusive-release/): Shashchessjrc — IJCCRL Exclusive Release Shashchessjrc is a modern Stockfish-derived chess engine, developed as an advanced fork of ShashChess and enhanced with deep NNUE integration and evaluation alignment with the latest official Stockfish. This engine is released as an exclusive download for IJCCRL Lifetime Members. It is intended for serious engine testers, analysts, and tournament organisers who demand correctness, transparency, and up-to-date evaluation logic. Engine Highlights Based on a modern Stockfish-derived core Forked from ShashChess with substantial, non-trivial code changes Integrated NNUE evaluation (big and small networks) NNUE handling designed for robust runtime loading and verification Evaluation aligned with the latest…  - [BrainlearnJRC 1.10-300126](https://ijccrl.com/brainlearnjrc-1-10-300126/): BrainlearnJRC 1.10 (300126) — Deterministic Engine Branding & Architecture-Specific Builds We are pleased to announce the release of BrainlearnJRC 1.10 (300126), a new version focused on clear engine identification, deterministic architecture naming, and robust build consistency across GUIs and toolchains. This update does not change playing strength or search logic. Instead, it resolves a long-standing practical issue for engine testers, GUI users, and automated pipelines: ambiguous engine names and inconsistent executable identifiers. 🎯 Motivation Modern chess-engine workflows rely heavily on exact engine identification: BrainlearnJRC 1.10 standardises all of this. ✅ What’s New 1. Deterministic UCI Engine ID The engine now reports…  - [How Integrate the Last Stockfish NNUE into a Stockfish-Derived](https://ijccrl.com/how-integrate-the-last-stockfish-nnue-into-a-stockfish-derived/): 🔎 Nota editorialEl artículo usa como ejemplo principal las redesBIG nn-2962dca31855.nnueSMALL nn-37f18f62d772.nnuepero la metodología es válida para redes posteriores (como nn-c288c895ea92.nnue).Donde procede, se explica por qué Stockfish tuvo que cambiar código al validar nuevas redes. How to Integrate the Latest Stockfish NNUE Networks into a Stockfish-Derived Chess Engine A deep technical guide with commit analysis and commented diffs Abstract Neural Network Unified Evaluation (NNUE) has fundamentally reshaped the architecture of modern chess engines derived from Stockfish. While the external appearance of NNUE updates suggests a simple replacement of .nnue files, real-world integration tells a very different story. In practice, successful NNUE…  - [How to Configure a Dual-Xeon for Cutechess Tour and Playchess](https://ijccrl.com/how-to-configure-a-dual-xeon-for-cutechess-tour-and-playchess/): How to Configure a Dual-Xeon Windows Server for Cutechess Tournaments and Playchess Online (Fritz 20) Without Errors This guide documents a proven, reproducible setup for running continuous chess-engine tournaments with cutechess-cli while simultaneously playing online on playchess.com from Fritz 20, without time forfeits, stability issues, or performance “jitter”. It is written for Windows 10 Pro for Workstations on a dual-socket Xeon server, but every step is adaptable to other hardware by changing a few variables in the scripts. 1. Target System and Goals 1.1 Reference hardware (the baseline used here) 1.2 Software stack 1.3 Non-negotiable objectives 2. Why Dual-Socket Servers Behave…  - [BrainlearnJRC 1.0-260126](https://ijccrl.com/brainlearnjrc-1-0-260126/): BrainLearnJRC 1.0-260126 Modern continuation of BrainLearn 31, validated for the current Stockfish NNUE ecosystem. NNUE Updated Reproducible Builds UCI Clean Output IJCCRL Edition Overview BrainLearnJRC 1.0-260126 is a modern continuation of BrainLearn 31, curated by the IJCCRL team with an emphasis on stability, reproducibility, and compatibility with the current Stockfish NNUE evaluation pipeline. This release is designed to help users clearly distinguish between the legacy BrainLearn 31 builds and the IJCCRL-maintained branch, especially regarding NNUE network selection, verification, and typical UCI usage. BrainLearn 31 vs BrainLearnJRC 1.0-260126 Area BrainLearn 31 (Legacy) BrainLearnJRC 1.0-260126 (IJCCRL) NNUE (Big) Older / legacy network outdated…  - [Wordfish- 4.0.1-260126](https://ijccrl.com/wordfish-4-0-1-260126/): Motivation Description Files changed: src/evaluate.h, scripts/net.sh, src/Makefile, src/engine.cpp, src/misc.h, src/nnue/features/full_threats.h, src/nnue/features/full_threats.cpp. Testing All automated steps above completed successfully in the test environment. - [Deepalienist 3.10-280126](https://ijccrl.com/deepalienist-3-10-230126/): Deepalienist 3.10 Released A Correct and Fully Aligned NNUE Integration with the Latest Stockfish Networks We are pleased to announce the release of Deepalienist 3.10, a major update that marks a technical milestone in the evolution of the engine. This version completes a full and correct integration of the latest Stockfish-validated NNUE networks, bringing Deepalienist back in line with modern Stockfish standards in terms of evaluation correctness, stability, and playing strength. This release is not a cosmetic update. It resolves long-standing NNUE integration issues that affected previous versions and establishes a clean, robust, and future-proof NNUE pipeline. What Makes Deepalienist 3.10…  - [revolution 4.60 230126](https://ijccrl.com/revolution-4-60-210126/): Motivation Description Testing - [Deepalienist-3.0-150126](https://ijccrl.com/deepalienist-3-0-150126/): Preventing Time Losses in Long Online Games Time Management Improvements in Deepalienist Introduction In high-level online chess engine competitions—particularly on platforms such as Playchess—time management becomes as critical as pure playing strength. During extensive testing of Deepalienist, our strongest engine to date, a recurring issue was identified: time losses in marathon games exceeding 140 plies, especially when the opponent deliberately repeats moves or steers the game into quiet, drawish positions. These losses are not caused by evaluation weakness, search instability, or tactical blindness. Instead, they originate from overly optimistic time usage in repetitive or low-risk positions, combined with the realities of…  - [How to Use a DGT Board with Fritz 20 on Playchess](https://ijccrl.com/how-to-use-a-dgt-board-with-fritz-20-on-playchess/): How to Use a DGT Board with Fritz 20 on Playchess.com Introduction The integration of electronic chessboards into modern chess practice represents one of the most significant bridges between traditional over-the-board chess and contemporary digital play. Among these devices, DGT electronic boards occupy a privileged position due to their precision, robustness, and widespread adoption in professional tournaments, clubs, and private study environments. When combined with advanced chess software such as ChessBase Fritz 20 and connected to the Playchess.com server, the DGT board enables a seamless hybrid experience: physical piece movement synchronized in real time with online opponents and engines. This guide…  - [Wordfish- 3.80-120126](https://ijccrl.com/wordfish-3-80-120126/): Motivation Description Testing - [Pullfish 3.0-120126](https://ijccrl.com/pullfish-3-0-120126/): Motivation Description Testing - [Revolution-4.40-120126](https://ijccrl.com/revolution-4-40-120126/): Motivation Description Testing - [Deepalienist 2.90-120126](https://ijccrl.com/deepalienist-2-90-120126/): Motivation Description Testing - [Lifetime update database 100126](https://ijccrl.com/lifetime-update-database-100126/): Lifetime Chess Engine Games Database Introduction This document presents the latest update to the Lifetime Chess Engine Games Database, a continuously curated and professionally maintained collection of high-quality games played exclusively by chess engines.The current update consolidates new material accumulated since the previous release and introduces several structured datasets and analytical resources designed to support advanced research, engine development, and statistical evaluation. 1. Incorporation of New Games Since the last official update, all newly played engine games have been systematically reviewed and incorporated into the Lifetime database. This ensures that the database remains progressively enriched while preserving long-term reliability and historical…  - [LesChats bin book series 09012026](https://ijccrl.com/leschats-bin-book-series-09012026/): Overview of the LesChats Opening Book Update (09012026) The LesChats 09012026 update represents a systematic and performance-oriented refinement of the opening book, aimed at improving competitive robustness in high-level computer-chess tournaments. The update combines curated empirical data, rigorous filtering procedures, targeted theoretical enhancements, and validated competitive results. Process and Methodology 1. Integration of Newly Played Games from Playchess.com The opening book was updated using recently played games on Playchess.com, ensuring that the material reflects contemporary engine practice rather than outdated theory. All candidate games were manually reviewed using Scid vs. PC, allowing for: This manual step ensures that only high-quality, practically…  - [revolution-4.30-070126](https://ijccrl.com/revolution-4-30-070126/): Motivation Description Testing - [Wordfish 3.70 070126](https://ijccrl.com/wordfish-3-70-070126/): Motivation Description Testing - [Deepalienist 2.80 070126](https://ijccrl.com/deepalienist-2-80-070126/): Motivation Description - [Revolution 4.20-040126](https://ijccrl.com/revolution-4-20-040126/): Summary of Changes This update introduces enhanced documentation clarifying advanced build-time optimisation strategies for Revolution on modern x86-64 platforms. Specifically, the README has been extended to provide explicit guidance on: The intent of these additions is to improve reproducibility, transparency, and performance literacy for developers and testers who compile Revolution with hardware-specific tuning, particularly in competitive computer-chess testing environments. Testing ⚠️ Not executed.This change is documentation-only and does not modify the engine’s source code or runtime behaviour. No functional or regression testing was required. Download - [LesChats bin book series 04012026](https://ijccrl.com/leschats-bin-book-series-04012026/): Summary Download - [Lifetime update database 040126](https://ijccrl.com/lifetime-update-database-040126/): Summary - [Wordfish 3.70 301225](https://ijccrl.com/wordfish-3-70-301225/): Summary Download - [Africaata 301225 ctg update](https://ijccrl.com/africaata-301225-ctg-update/): Summary - [Deepalienist-2.70-301225](https://ijccrl.com/deepalienist-2-70-301225/): Summary Resign option guide (online and local play) The engine now exposes the boolean UCI option Resign alongside the thresholds ResignScore (centipawns) and ResignPlies to control safe auto-resignation. The search loop will only resign when: We recommend the following presets so users know exactly how to deploy the feature on different servers: Context Resign ResignScore ResignPlies Notes Playchess.com (strict resignation policies) true 900 10–12 Avoids prolonging lost games while keeping a conservative threshold for fair-play rules. Lichess (bots and fast matches) true 800 8–10 Uses the default centipawn threshold with slightly fewer plies to save clock time in rapid games. Local play / training false (analysis) or true (engine matches)…  - [Revolution 4.10-261225](https://ijccrl.com/revolution-4-10-261225/): Summary Download - [Deepalienist 2.50 241225](https://ijccrl.com/deepalienist-2-50-241225/): Summary Testing - [Pullfish 2.90 221225](https://ijccrl.com/pullfish-2-90-221225/): Summary - [Brainlearnjrc-3.0-120826](https://ijccrl.com/brainlearnjrc-3-0-120826/): Brainlearnjrc-3.10-120826 — SSE41/POPCNT + x86-64 Universal Release Stockfish dev topology through 10 August 2026 • 5062aee5 • nn-ab28990d4ea3.nnue • 0 warnings / 0 errors ✅ IJCCRL Accepted Brainlearnjrc-3.10-120826 is the current accepted BrainLearnJRC release and supersedes the previous Brainlearnjrc-2.90-080726 announcement. The maintained derivative tree was reconciled against the Stockfish development line through 10 August 2026, ending at the exact target 5062aee519a1ba262d472d8ab139851ced56573e, while preserving BrainLearnJRC learning, book, experience, Syzygy and UCI extensions. The largest visible difference from the former HTML is the release packaging. Version 2.90 was explicitly published as an SSE41/POPCNT-only package. Version 3.10 now has two validated Windows targets: Brainlearnjrc-3.10-120826-sse41popcnt.exe…  - [StockfishJRC-2.60-290726-sse41popcnt](https://ijccrl.com/stockfishjrc-2-60-290726-sse41popcnt/): Audit of the three logs The actual configuration was: The resulting executable is exactly: This count corresponds to the default benchmark for the PGO process and should not be directly compared with the short benchmark “bench 16 1 8 default depth” from the P0R audit. - [Deepalienist-5.30-220726](https://ijccrl.com/deepalienist-5-30-220726/): Deepalienist-5.30-220726 — IJCCRL Lifetime / Platinum Engines Release Stockfish-dev chronology through Jul20 • SFNNv16 • NNUE nn-89cb98a217f7 • SSE4.1/POPCNT profile-build • Architecture-qualified UCI identity 🏆 IJCCRL Verified Deepalienist-5.30-220726 is the current IJCCRL-maintained Deepalienist release for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. It supersedes the Deepalienist-5.10-130726 release documented by the previous version of this page. The highlighted package is the Windows-compatible SSE4.1/POPCNT profile-guided build: Deepalienist-5.30-220726-sse41-popcnt.exe. The startup header reports the release root Deepalienist-5.30-220726, while the UCI identity reports id name Deepalienist-5.30-220726-sse41-popcnt. Fritz 21, Cute Chess, IJCCRL Broadcast, analysis windows, tournament logs and PGN metadata can…  - [Tournament Performance Versus Long-Term Chess Engine Ratings](https://ijccrl.com/tournament-performance-versus-long-term-chess-engine-ratings/): Why a tournament winner, performance rating and long-term chess engine rating list answer different questions about engine strength. - [How to Cite a Chess Engine Rating List Correctly](https://ijccrl.com/how-to-cite-chess-engine-rating-list-correctly/): A practical citation guide for chess engine rating lists: list name, date, version, Elo, uncertainty, games, conditions and archive URL. - [Rolling Ratings, Frozen Snapshots and Historical Recalculation](https://ijccrl.com/rolling-ratings-frozen-snapshots-historical-recalculation/): How live rolling ratings, frozen snapshots, archives and historical recalculation should be used in chess engine rating publication. - [StockfishJRC- 2.50-160726 sse41popcnt](https://ijccrl.com/stockfishjrc-2-50-160726-sse41popcnt/): St StockfishJRC-2.50-160726 — Official IJCCRL Verified Release Stockfish-derived • audited topology through 10 July 2026 • official 11 July NMP revert • nn-0ee0657fb25e NNUE • SSE41POPCNT binary validated 🏆 IJCCRL Verified StockfishJRC-2.50-160726 is the new official IJCCRL verified release for the StockfishJRC line. Relative to StockfishJRC-2.40-020726, this release advances the audited source baseline from the Stockfish dev 30 June 2026 closure to the verified topology through the 10 July 2026 block, followed by the exact official 11 July 2026 null-move-pruning revert. The active NNUE authority changes to nn-0ee0657fb25e.nnue, the SFNNv15 network topology is present, and the final public identity is StockfishJRC-2.50-160726.…  - [Deepalienist-5.10-140726](https://ijccrl.com/deepalienist-5-10-140726/): Deepalienist-5.10-130726 — IJCCRL Lifetime / Platinum Engines Release Stockfish dev chronology through Jul11 • SFNNv15 • NNUE nn-0ee0657fb25e • SSE4.1/POPCNT profile-build • Stability tests included 🏆 IJCCRL Verified Deepalienist-5.10-130726 is the current IJCCRL-maintained Deepalienist release for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. It supersedes the Deepalienist-5.0-300626 release described by the previous version of this page. The highlighted package is the SSE4.1/POPCNT profile-guided build: Deepalienist-5.10-130726-sse41-popcnt.exe. Its UCI identity is id name Deepalienist-5.10-130726-sse41-popcnt, allowing Fritz 21, Cute Chess, IJCCRL Broadcast, tournament logs and PGN metadata to distinguish both the release and the exact compiled architecture. Release…  - [Brainlearnjrc-2.90-080726-sse41popcnt](https://ijccrl.com/brainlearnjrc-2-90-080726-sse41popcnt/): Brainlearnjrc-2.90-080726 — SSE41/POPCNT Public Release Stockfish dev topology through 6 July 2026 • SFNNv15 • nn-0ee0657fb25e.nnue • Single published binary: sse41popcnt ✅ IJCCRL Accepted Brainlearnjrc-2.90-080726 is the new accepted BrainLearnJRC public release. It updates the previous Brainlearnjrc-2.80-280626 line from the Jun27 Stockfish-dev closure to the accepted Stockfish dev 6 July 2026 topology, preserving the maintained BrainLearnJRC learning, book and experience subsystems. This release is published as a single SSE41/POPCNT compatibility binary. No AVX2, BMI2, FMA3, AVX512 or wider architecture matrix is advertised in this public package. Users should load only the published Brainlearnjrc-2.90-080726-sse41popcnt executable for this release. Release scope The update…  - [Africaata ctg v.050726](https://ijccrl.com/africaata-ctg-v-050726/): Africaata CTG Update v.050726 — ChessBase 19 Filtering and Python Anti-Trojan Cleanup New CTG release focused on curated PGN intake, stricter opening-tree hygiene, and removal of contaminated game material before book construction What Changed in v.050726 Africaata CTG v.050726 is the new release of the opening book in .ctg format. 6,394 games were counted in the supplied PGN database from the publication date of the previous release, 15 April 2026, through 5 July 2026. The new material was filtered with ChessBase 19 before book integration, with additional Python-based screening to search for Trojan games and polluted move paths that could contaminate…  - [Revolution-6.0-070726](https://ijccrl.com/revolution-6-0-070726/): Revolution-6.0-040526 — Official IJCCRL Release Stockfish-derived • Strict single-net • SFNNv15 • Stockfish-dev Jul 3 topology • SSE4.1/POPCNT verified 🏆 IJCCRL Verified Revolution-6.0-040526 supersedes Revolution-5.90-140626 as the current IJCCRL-maintained Revolution release. This update preserves the strict active single-net architecture, moves the active NNUE authority to nn-0ee0657fb25e.nnue, closes the controlled Stockfish-dev topology sequence through July 3, 2026, and publishes the validated SSE4.1/POPCNT binary identity Revolution-6.0-040526-sse41popcnt. This release should not be described as an Elo claim, a speculative strength patch, a new book layer, or a broad unverified rebase. The release is a forensic maintenance and topology-integration update: Jun14 MultiPV and RelaxedAtomic closure,…  - [StockfishJRC- 2.40-020726 sse41popcnt](https://ijccrl.com/stockfishjrc-2-40-020726-sse41popcnt/): StockfishJRC-2.40-020726 — Official IJCCRL Verified Release Stockfish-derived • Stockfish dev 20260630 topology closure • nn-af1339a6dea3 NNUE • strict single-net • SSE4POPCNT profile-build validated 🏆 IJCCRL Verified StockfishJRC-2.40-020726 is the new official IJCCRL verified release for the StockfishJRC line. Relative to the previous public block for StockfishJRC-2.20-070626, this release moves the source baseline from the Stockfish dev 20260606 era to the verified Stockfish dev 20260630 topology closure. The active NNUE authority is now nn-af1339a6dea3.nnue, the Jun30 evaluation change is present, and the release identity has been updated to StockfishJRC-2.40-020726 in both the executable and UCI name. The practical consequence is that StockfishJRC-2.40-020726…  - [Deepalienist-5.0-300626](https://ijccrl.com/deepalienist-5-0-300626/): Deepalienist 5.0-300626 — IJCCRL Lifetime / Platinum Engines Release Stockfish dev Jun10→Jun30 topology completion • final NNUE nn-af1339a6dea3 • SSE4.1/POPCNT profile-build • Audit logs included 🏆 IJCCRL Verified Deepalienist 5.0-300626 is an IJCCRL engine release prepared for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. This release updates the previous Deepalienist 4.90-140626 line and closes the official Stockfish dev chronology through June 30, 2026, including the final NNUE update, the Jun30 PSQT simplification and the profile-build Makefile correction needed for clean SSE4.1/POPCNT PGO validation. The highlighted package is the SSE4.1/POPCNT optimized Windows-compatible profile-build, exposed as Deepalienist-5.0-300626-sse41popcnt.exe.…  - [Pullfish-3.50-290626](https://ijccrl.com/pullfish-3-50-290626/): Pullfish-3.50-290626 — IJCCRL Premium Engines Release Stockfish-derived • Stockfish dev 2026-06-29 topology • nn-af1339a6dea3.nnue • SSE4.1/POPCNT binary only 🏆 IJCCRL Premium Pullfish-3.50-290626 is the current IJCCRL Premium Engines release for the Pullfish line. This update closes the chronological Stockfish development topology through stockfish-dev-20260629-4488343c and moves the active main NNUE to nn-af1339a6dea3.nnue. This is a source-topology update and release rebrand, not a blind upstream overwrite. Pullfish keeps its Book / CTG-BIN, Experience, sparsehash and Zobrist surfaces while updating the engine identity to Pullfish-3.50-290626. Important release scope This Pullfish 3.50 release currently provides only one compiled binary: Pullfish-3.50-290626-sse41popcnt. There is no Linux/Windows multi-target…  - [Brainlearnjrc-2.80-280626](https://ijccrl.com/brainlearnjrc-2-80-280626/): Brainlearnjrc-2.80-280626 — IJCCRL Platinum Release nn-1b6a final NNUE • Stockfish dev May24-Jun27 topology • pdep/pext guard closure • Architecture-specific UCI identity • Audit logs included 🏆 IJCCRL Platinum Brainlearnjrc-2.80-280626 is the current IJCCRL Platinum build of BrainLearnJRC. This package updates the previous BrainLearnJRC-2.70-310526 line with the accepted Stockfish dev topology through 27 June 2026, the final main NNUE nn-1b6a82263149.nnue, and a corrected architecture-specific UCI identity. The update preserves the maintained BrainLearnJRC subsystems: Learn, Experience, Experience Book, Book/livebook, Zobrist, Syzygy, UCI option behaviour and the strict single-net model. It is not a broad source overwrite and does not make an unsupported Elo…  - [Wordfish-5.10-260626](https://ijccrl.com/wordfish-5-10-260626/): Wordfish 5.10-260626 — IJCCRL Verified Stockfish-dev25 Source Closure Stockfish-derived • Strict single-net preserved • Default NNUE: nn-f8a759c05f9f.nnue • Dev25 topology closure • Rebranded executable identity • Zero-warning local profile validation 🏆 IJCCRL Verified Wordfish 5.10-260626 is the current IJCCRL verified Wordfish release after the Stockfish-dev June 25 source closure and the final 5.10 identity rebrand. It keeps the strict single-net Wordfish architecture, preserves the Wordfish auxiliary systems, updates the default NNUE authority to nn-f8a759c05f9f.nnue, and changes the active public identity from Wordfish-5.0-120626 to Wordfish-5.10-260626. This release is not a cosmetic rename of Wordfish 5.0-120626. The 5.10 line closes the later Jun9/Jun10,…  - [StockfishJRC- 2.30-190626-Platinum](https://ijccrl.com/stockfishjrc-2-30-190626-platinum/): StockfishJRC- 2.30-190626-Platinum Stockfishjrc-2.30-190626 — IJCCRL Platinum Release Stockfish dev 20260614 / 74a0a73 • chronological topology closure • Linux + Windows binary matrix • SHA-256 + manifests • Zero-warning policy 🏆 IJCCRL Platinum Stockfishjrc-2.30-190626 is the current IJCCRL Platinum release of StockfishJRC. It supersedes StockfishJRC-2.20-070626 and closes the update path to Stockfish dev 20260614 / 74a0a73 through a documented chronological port, not through a blind overwrite of the StockfishJRC tree. This page has been updated with the compiled release material: Linux binaries produced on the Ubuntu VPS, Windows-compatible binaries produced from the Ubuntu cross-build matrix, SHA-256 checksum material and manifests. Accepted binaries…  - [StockfishJRC- 2.30-190626-sse41popcnt](https://ijccrl.com/stockfishjrc-2-30-190626-sse41popcnt/): Stockfishjrc-2.30-190626 — IJCCRL Platinum Release Stockfish dev 20260614 / 74a0a73 • chronological topology closure • nn-71 single-net • SSE4.1/POPCNT profile-build validated • Zero-warning policy 🏆 IJCCRL Platinum Stockfishjrc-2.30-190626 is the current IJCCRL Platinum source-line update of StockfishJRC. This release supersedes StockfishJRC-2.20-070626 and closes the full update path to Stockfish dev 20260614 / 74a0a73 through a documented chronological port, not through a blind overwrite of the StockfishJRC tree. The central difference in this release is the forensic discipline of the update. The work was applied in temporal blocks matching the official Stockfish development topology: June 6-7, June 8, June 9, June 10,…  - [Deepalienist-4.90-150626 — IJCCRL Platinum Release](https://ijccrl.com/deepalienist-4-90-150626-ijccrl-platinum-release/): Deepalienist 4.90-140626 — IJCCRL Lifetime / Platinum Engines Release Stockfish dev Jun6→Jun14 topology completion • attacks.h / types.h closure • SSE4.1/POPCNT profile-build • Audit logs included 🏆 IJCCRL Verified Deepalienist 4.90-140626 is an IJCCRL engine release prepared for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. This release is not a cosmetic rebuild. It completes the chronological Stockfish dev source topology from June 6 through June 14, 2026, including the modern attacks module, the corrected low-level type/helper visibility, and the final source closure required to obtain a clean optimized SSE4.1/POPCNT profile-build. The currently highlighted package is…  - [Deepalienist 4.90-150626 sse41popcnt](https://ijccrl.com/deepalienist-4-90-150626-sse41popcnt/): Deepalienist 4.90-140626 — IJCCRL Lifetime / Platinum Engines Release Stockfish dev Jun6→Jun14 topology completion • attacks.h / types.h closure • SSE4.1/POPCNT profile-build • Audit logs included 🏆 IJCCRL Verified Deepalienist 4.90-140626 is an IJCCRL engine release prepared for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. This release is not a cosmetic rebuild. It completes the chronological Stockfish dev source topology from June 6 through June 14, 2026, including the modern attacks module, the corrected low-level type/helper visibility, and the final source closure required to obtain a clean optimized SSE4.1/POPCNT profile-build. The currently highlighted package is…  - [Revolution-5.90-140626](https://ijccrl.com/revolution-5-90-140626/): Revolution-5.90-140626 — Official IJCCRL Release Stockfish-derived • Strict single-net • Stockfish-dev Jun 6–10 topology • attacks.h helper visibility fix • Linux verified 🏆 IJCCRL Verified Revolution-5.90-140626 supersedes Revolution-5.80-030625 as the current IJCCRL-maintained Revolution release. This update preserves the strict active single-net architecture, keeps nn-71d6d32cb962.nnue as the only active NNUE authority, applies a controlled Stockfish-dev topology block from June 6 through June 10, 2026, and includes a narrow src/types.h visibility fix required by the modern attacks.h topology for AVX2 and BMI2 builds. This release should not be described as an Elo claim, a speculative strength patch, a new book layer, or a…  - [Wordfish-5.0-120626](https://ijccrl.com/wordfish-5-0-120626/): Wordfish 5.0-120626 — IJCCRL Verified Stockfish-dev Source Closure Stockfish-derived • Strict single-net preserved • Default NNUE: nn-71d6d32cb962.nnue • Jun 10 core corrections closed • Linux + Windows binaries included • Makefile-based architecture package 🏆 IJCCRL Verified Wordfish 5.0-120626 is the current IJCCRL verified Wordfish release after the Stockfish-dev source-port closure up to the audited June 2026 authority window. It keeps the strict single-net architecture achieved in the previous Wordfish 4.90-220526 release, but replaces the old 4.90 release boundary with a materially updated source tree: the active NNUE authority is now nn-71d6d32cb962.nnue, QAT scaling is preserved, and the critical June 10 position…  - [Pullfish-3.40-100626-ijccrl platinum](https://ijccrl.com/pullfish-3-40-100626-ijccrl-platinum/): pullfish-3.40-100626 — IJCCRL Premium Engines Release Stockfish-derived • Stockfish 7c7fe322 migration • HalfKA/Threats merged accumulator • Linux host-PGO + Windows MinGW binaries 🏆 IJCCRL Premium pullfish-3.40-100626 is the current IJCCRL Premium Engines release for the Pullfish line. This page documents the full accepted binary package after the Linux host-PGO builds and the Windows MinGW cross-builds completed under the IJCCRL zero-warning / zero-error validation policy. This release is not a cosmetic rename and not a blind Stockfish overwrite. Pullfish 3.40 ports the relevant official Stockfish development window up to 7c7fe322, updates the active NNUE authority to nn-71d6d32cb962.nnue, preserves the Pullfish Book /…  - [Pullfish-3.40-100626-sse41popcnt](https://ijccrl.com/pullfish-3-40-100626-sse41popcnt/): pullfish-3.40-100626 — IJCCRL Premium Engines Release Stockfish-derived • Stockfish 7c7fe322 migration • HalfKA/Threats merged accumulator • SSE41/POPCNT validated baseline 🏆 IJCCRL Premium pullfish-3.40-100626 is the current IJCCRL Premium Engines release for the Pullfish line. This page documents the validated SSE41/POPCNT baseline binary and the engineering work applied after Pullfish 3.30-300526. This release is not a cosmetic rename and not a blind Stockfish overwrite. Pullfish 3.40 ports the relevant official Stockfish development window up to 7c7fe322, updates the active NNUE authority to nn-71d6d32cb962.nnue, preserves the Pullfish Book / Experience / Zobrist subsystems, and records a clean rebrand where the executable, UCI console…  - [StockfishJRC- 2.20-070626-ijccrl platinum](https://ijccrl.com/stockfishjrc-2-20-070626-ijccrl-platinum/): StockfishJRC-2.20-070626 — IJCCRL Platinum Release Stockfish dev 20260606 • nn-71 QAT NNUE • strict single-net • Linux and Windows accepted builds • Zero-warning policy 🏆 IJCCRL Platinum StockfishJRC-2.20-070626 is the current IJCCRL Platinum build of StockfishJRC. This package is prepared for IJCCRL Lifetime Membership, users with a superior access level, IJCCRL Platinum users and active monthly Platinum subscribers. The package focuses on the new StockfishJRC 2.20 source update, the accepted Linux and Windows binaries, validation logs and SHA-256 checksums. This is not an Elo marketing release. The difference from StockfishJRC-2.10-180526 is technical and auditable: the active NNUE authority has moved from…  - [StockfishJRC- 2.20-070626 sse41popcnt 0 warnings 0 errors](https://ijccrl.com/stockfishjrc-2-20-070626-sse41popcnt-0-warnings-0-errors/): StockfishJRC-2.20-070626 — Official IJCCRL Verified Release Stockfish-derived • Stockfish dev 20260606 port • nn-71d6d32cb962 NNUE • strict single-net • SSE4.1/POPCNT validated 🏆 IJCCRL Verified StockfishJRC-2.20-070626 is the new official IJCCRL verified release for the StockfishJRC line. Relative to StockfishJRC-2.10-180526, this release is not a second single-net migration. The single-net architecture was already established in the previous release. This version updates StockfishJRC to the relevant Stockfish dev 20260606 source changes, updates the active NNUE authority to nn-71d6d32cb962.nnue, ports the QAT NNUE format changes, and completes the attacks, search, TT and L3 cache-detection updates required by the newer baseline. The practical consequence is…  - [Deepalienist-4.80-0500626 — IJCCRL Platinum Release](https://ijccrl.com/deepalienist-4-80-0500626-ijccrl-platinum-release/): Deepalienist-4.80-0500626 — IJCCRL Platinum Release nn-71 QAT NNUE • Experience default ON • Linux and Windows matrix • Zero-warning accepted builds • Audit logs included 🏆 IJCCRL Platinum Deepalienist-4.80-0500626 is the current IJCCRL Platinum build of Deepalienist. This package is prepared for IJCCRL Lifetime Membership, users with a superior access level, IJCCRL Platinum users and active monthly Platinum subscribers. The package focuses on the new Deepalienist 4.80 source update, the accepted Linux and Windows binaries, validation logs and SHA-256 checksums. This is not an Elo marketing release. The difference from Deepalienist-4.70-190526 is technical and auditable: the active NNUE authority has moved…  - [Deepalienist 4.80-050626 sse41popcnt](https://ijccrl.com/deepalienist-4-80-050626-sse41popcnt/): Deepalienist 4.80-0500626 — IJCCRL Lifetime / Platinum Engines Release Stockfish 20260529 QAT NNUE update • Experience default-on • SSE4.1/POPCNT profile-build • Audit logs included 🏆 IJCCRL Verified Deepalienist 4.80-0500626 is an IJCCRL engine release prepared for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. This version is not a cosmetic rename. It combines the latest validated Deepalienist source update with the current Stockfish 20260529 NNUE/QAT authority, a controlled rebrand, automatic default Experience activation, and zero-warning / zero-error validation for the highlighted SSE4.1/POPCNT build. The currently highlighted package is the SSE4.1/POPCNT optimized Windows-compatible build, exposed as Deepalienist-4.80-0500626-sse41popcnt.exe.…  - [Revolution-5.80-040626](https://ijccrl.com/revolution-5-80-040626/): Revolution-5.80-030625 — Official IJCCRL Release Stockfish-derived • Strict single-net architecture • NNUE authority updated • MCTS fossil removed • Linux/Windows builds • IJCCRL Verified 🏆 IJCCRL Verified Revolution-5.80-030625 supersedes Revolution-5.70-250526 as the current IJCCRL-maintained Revolution release. The previous 5.70 release completed the strict active single-net migration. This 5.80 release keeps that architecture intact, updates the active single-net NNUE authority to nn-71d6d32cb962.nnue, removes the obsolete MCTS fossil directory from the active source tree, and provides a fresh Linux and Windows-compatible binary set built from the real Revolution-5.80-030625 source tree. This release should not be described as an Elo claim, a speculative strength…  - [Brainlearnjrc-2.70-310526-IJCCRL PLATINUM ENGINES](https://ijccrl.com/brainlearnjrc-2-70-310526-ijccrl-platinum-engines/): BrainLearnJRC-2.70-310526 — IJCCRL Platinum Release nn-71 QAT NNUE • Linux and Windows matrix • Embedded runtime validated • Zero-warning accepted builds • Audit logs included 🏆 IJCCRL Platinum BrainLearnJRC-2.70-310526 is the current IJCCRL Platinum build of BrainLearnJRC. This package is intended for users who require the full accepted architecture-specific binary set for both Linux and Windows, together with build logs, validation material and SHA-256 checksums. The release was rebuilt from the clean BrainLearnJRC 2.60 base, then updated through the validated Stockfish changes that were compatible with the maintained BrainLearnJRC tree. The update preserves the BrainLearnJRC subsystems: Learn, Experience, Book/livebook, Zobrist, Syzygy,…  - [Brainlearnjrc-2.70-310526](https://ijccrl.com/brainlearnjrc-2-70-310526/): BrainLearnJRC-2.70-310526 — IJCCRL Lifetime Membership Release SSE41/POPCNT binary available • nn-71 QAT NNUE • Embedded runtime verified • Fritz checked • IJCCRL Verified 🏆 IJCCRL Verified BrainLearnJRC-2.70-310526 is the current IJCCRL verified Lifetime Membership SSE41/POPCNT release of BrainLearnJRC. This package currently contains the audited Windows binary: BrainLearnJRC-2.70-310526-sse41popcnt.exe. This release replaces the previous Brainlearnjrc-2.60-200526 package after a clean regression to the known-good 2.60 source base, followed by a controlled port of two official Stockfish changes only: the L3 cache detection cleanup and the new QAT-trained main NNUE network nn-71d6d32cb962.nnue. The update preserves the BrainLearnJRC learning, experience, book, Syzygy, Zobrist, UCI option, and…  - [Pullfish-3.30-300526 premium package](https://ijccrl.com/pullfish-3-30-300526-premium-package/): Pullfish-3.30-300526 — IJCCRL Premium Engines Release Stockfish-derived • Revolution-aligned source convergence • b105 selective patch handling • Strict active single-net NNUE 🏆 IJCCRL Premium Pullfish-3.30-300526 is the current IJCCRL Premium Engines release for the Pullfish line. This version replaces the previous Pullfish 3.20 public release line and records the engineering work required to converge the tree toward the Revolution source architecture while preserving the Pullfish NNUE authority and public UCI identity. This release is not a cosmetic rename and not a blind Stockfish overwrite. The work combines a controlled Revolution-style source convergence, explicit removal of experimental fossil code, selective handling of…  - [Pullfish-3.30-300526-sse41popcnt](https://ijccrl.com/pullfish-3-30-300526-sse41popcnt/): Pullfish-3.30-300526 — IJCCRL Premium Engines Release Stockfish-derived • Revolution-aligned source convergence • b105 selective patch handling • Strict active single-net NNUE 🏆 IJCCRL Premium Pullfish-3.30-300526 is the current IJCCRL Premium Engines release for the Pullfish line. This version replaces the previous Pullfish 3.20 public release line and records the engineering work required to converge the tree toward the Revolution source architecture while preserving the Pullfish NNUE authority and public UCI identity. This release is not a cosmetic rename and not a blind Stockfish overwrite. The work combines a controlled Revolution-style source convergence, explicit removal of experimental fossil code, selective handling of…  - [Public Evidence Chains for Computer Chess Rating Lists](https://ijccrl.com/public-evidence-chains-computer-chess-rating-lists/): How public evidence chains connect live games, PGN files, downloads, archive entries, winners pages and computer chess rating lists. - [How to Read Computer Chess Rating List Method Notes](https://ijccrl.com/how-to-read-computer-chess-rating-list-method-notes/): A reader-focused guide to method notes in computer chess rating lists: time control, books, tablebases, engines, game counts, statistics and exclusions. - [Fritz 21 Guide Installation in ChessBase Windows Chess GUI](https://ijccrl.com/fritz-21-guide-installation-in-chessbase-windows-chess-gui/): This article is based only on official ChessBase sources: the ChessBase Shop product pages for Fritz 21 and Fritz 20, the official ChessBase Fritz 21 feature page, the ChessBase news announcement, and the official ChessBase Fritz help pages for activation, serial numbers and deactivation. No third-party rating list, forum comment, independent benchmark or unofficial installation guide is used. That distinction matters because Fritz 21 is both a chess engine and a commercial training GUI, and any serious guide must separate verified product information from speculation. ChessBase presents Fritz 21 as “Your Personal Chess Trainer” and positions it not merely as an…  - [Fast Tests, Benchmarks and Computer Chess Rating Lists](https://ijccrl.com/fast-tests-benchmarks-computer-chess-rating-lists/): Why fast engine tests, hardware benchmarks and computer chess rating lists answer different questions and should not be merged without context. - [Adjudication Rules in Computer Chess Rating Publication](https://ijccrl.com/adjudication-rules-computer-chess-rating-publication/): A technical article on adjudication rules, crashes, timeouts and tablebase decisions in computer chess rating publication. - [Revolution-5.70-250526](https://ijccrl.com/revolution-5-70-250526/): Revolution-5.70-250526 — Official IJCCRL Release Stockfish-derived • Strict active single-net architecture • NNUE authority cleaned • Linux/Windows builds • IJCCRL Verified 🏆 IJCCRL Verified Revolution-5.70-250526 supersedes Revolution-5.60-100526 as the current IJCCRL-maintained Revolution release. Relative to 5.60, this is no longer a narrow big-NNUE filename-authority update. It is a controlled engineering migration of the Revolution source tree from a historical dual-net NNUE layout to a strict active single-net architecture, using nn-83a0d6daf7e5.nnue as the single active NNUE authority. This release should not be described as an Elo claim, a speculative strength patch, a new search experiment, or a broad Stockfish resynchronisation. The purpose…  - [Original UCI Tracks and Computer Chess Rating Trust](https://ijccrl.com/original-uci-tracks-computer-chess-rating-trust/): Why original UCI engine tracks strengthen trust in computer chess rating lists by preserving engine-family diversity and separating derived-engine experiments. - [From Live Broadcast to Computer Chess Rating List](https://ijccrl.com/from-live-broadcast-to-computer-chess-rating-list/): How live chess engine broadcasts can feed computer chess rating lists when games, PGNs, audit status and publication surfaces are connected correctly. - [Wordfish-4.90-220526](https://ijccrl.com/wordfish-4-90-220526/): Wordfish 4.90-220526 — IJCCRL Verified Strict Single-Net Release Stockfish-derived • Strict single-net source closure • Default NNUE: nn-83a0d6daf7e5.nnue • EvalFileSmall removed • Zero warnings / zero errors binary validation • Architecture-aware UCI identity preserved 🏆 IJCCRL Verified Wordfish 4.90-220526 is the current IJCCRL verified Wordfish release after the strict single-net engineering closure of the source tree. The previous Wordfish line had historically carried dual-net surfaces inherited from a big/small NNUE architecture. This release closes that transition: the public small-net option is gone, the small-net file is no longer required, the dual-net holder was removed, the transitional single-net adapters were retired, and…  - [Downloads and Statistics Behind Computer Chess Ratings](https://ijccrl.com/downloads-statistics-behind-computer-chess-ratings/): How downloads, PGN packs and statistics strengthen computer chess ratings by making the evidence inspectable, portable and historically recoverable. - [Hardware Transparency in a Computer Chess Rating List](https://ijccrl.com/hardware-transparency-computer-chess-rating-list/): Why CPU, threads, hash, Syzygy access and hardware disclosure matter when publishing a computer chess rating list. - [Brainlearnjrc-2.60-200526-IJCCRL PLATINUM ENGINES](https://ijccrl.com/brainlearnjrc-2-60-200526-ijccrl-platinum-engines/): Brainlearnjrc-2.60-200526 — IJCCRL Premium Engines Release Single-net NNUE • Modern Linux and Windows binaries • Zero-warning validation • Audit logs included 🏆 IJCCRL Premium Brainlearnjrc-2.60-200526 is now available as an IJCCRL Premium Engines release. This package is intended for users who require the complete architecture-specific binary set for both Linux and Windows, instead of only the conservative compatibility binary. This is not a marketing rebuild and not a cosmetic rename. The release integrates the relevant Stockfish dev-20260519 maintenance work into the BrainLearnJRC tree while preserving the maintained BrainLearnJRC subsystems: Learn, Experience, Book/livebook, Zobrist, Syzygy, UCI identity and the strict single-net NNUE…  - [Brainlearnjrc-2.60-200526 — Official IJCCRL Release](https://ijccrl.com/brainlearnjrc-2-60-200526-official-ijccrl-release/): Brainlearnjrc-2.60-200526 — IJCCRL Subscribers Release SSE41/POPCNT binary available • Single-net NNUE • Stockfish dev-20260519 aligned • Zero-warning build audit • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-2.60-200526 is the current IJCCRL verified subscribers build of BrainLearnJRC. This package currently contains the audited SSE41/POPCNT Windows binary: Brainlearnjrc-2.60-200526-sse41popcnt.exe. It is available for Lifetime, IJCCRL Premium Engines, and IJCCRL Platinum subscribers. This release is not presented as a broad architecture rewrite. It is a controlled Stockfish-dev maintenance update applied to the BrainLearnJRC tree after forensic source review, preserving the BrainLearnJRC learning, experience, book, Syzygy, Zobrist, and UCI identity layers. The validated subscriber binary is the…  - [Opening Books and Switched-Side Testing in Computer Chess Ratings](https://ijccrl.com/opening-books-and-switched-side-testing-in-computer-chess-ratings/): How opening books, mirrored openings and switched-side testing affect computer chess ratings and why pair-ratio discipline matters for public interpretation. - [Deepalienist 4.70-190526 IJCCRL PLATINUM ENGINES](https://ijccrl.com/deepalienist-4-70-190526-ijccrl-platinum-engines/): Deepalienist-4.70-190526 — IJCCRL Platinum Engines Release Strict single-net NNUE • Modern Linux and Windows binaries • Zero-warning validation • Audit logs included 🏆 IJCCRL Platinum Deepalienist-4.70-190526 is now available as an IJCCRL Platinum Engines release. This package is intended for users who require the complete modern binary set for both Linux and Windows, with each accepted binary compiled for its specific instruction target and validated under a zero-warning / zero-error policy. This is not a marketing rebuild and not a cosmetic rename. The release is based on a strict single-net Stockfish NNUE authority, removes obsolete dual-net/small-net source and build surfaces, and…  - [Deepalienist 4.70-190526 sse41popcnt](https://ijccrl.com/deepalienist-4-70-190526-sse41popcnt/): Deepalienist-4.70-190526 — IJCCRL Premium Engines Release Strict single-net Stockfish NNUE authority • Zero-warning validation • SSE4.1/POPCNT optimized binary • Audit logs included 🏆 IJCCRL Verified Deepalienist-4.70-190526 is an official IJCCRL Premium Engines release prepared for Lifetime, Platinum and IJCCRL Premium Chess Engines users. This version is not a cosmetic rename and not a speculative tuning release. It is a controlled engineering release focused on strict Stockfish single-net NNUE alignment, removal of obsolete dual-network source and Makefile surfaces, reproducible architecture-specific identity, and zero-warning / zero-error validation. The download package includes the validated binary, build output and audit material used to verify the…  - [Engine Inclusion Rules for a Computer Chess Rating List](https://ijccrl.com/engine-inclusion-rules-computer-chess-rating-list/): A strict editorial framework for engine inclusion rules in a computer chess rating list: public releases, private engines, original engines, derived engines and version control. - [StockfishJRC- 2.10-180526-JCCRL Platinum Engines](https://ijccrl.com/stockfishjrc-2-10-180526-jccrl-platinum-engines/): StockfishJRC-2.10-180526 — IJCCRL Platinum Engines Single-net architecture • Windows and Linux binaries • Modern CPU instructions • Zero warnings / zero errors ⚙️ Platinum Engines StockfishJRC-2.10-180526 — IJCCRL Platinum Engines is the extended technical package for users who want the complete set of modern, architecture-specific binaries for the new StockfishJRC single-net release. This package includes Windows-compatible and Linux binaries compiled for several CPU instruction targets, each accepted only after a strict clean-build audit. This is not a cosmetic packaging layer. StockfishJRC-2.10-180526 is the first StockfishJRC release after the controlled migration from the older dual-network NNUE model to a modern single-net NNUE…  - [StockfishJRC- 2.10-180526 sse41popcnt 0 warnings 0 errors](https://ijccrl.com/stockfishjrc-2-10-180526-sse41popcnt/): StockfishJRC-2.10-180526 — Official IJCCRL Single-Net Release Stockfish-derived • dd321af5 single-net architecture • EvalFile-only NNUE • SSE4.1/POPCNT profile-build validated 🏆 IJCCRL Verified StockfishJRC-2.10-180526 is the new official IJCCRL verified release for the StockfishJRC line. Relative to StockfishJRC-2.0-150526, this is not a cosmetic rename and not only a default-network filename update. This release marks the controlled migration of StockfishJRC from the previous dual-network NNUE model to the modern single-net NNUE architecture aligned with the Stockfish dd321af5 development baseline. The practical consequence is simple: StockfishJRC-2.10-180526 now exposes EvalFile as the single public NNUE option, uses nn-83a0d6daf7e5.nnue as its default NNUE authority, and no longer…  - [Computer Chess Rating List Archives](https://ijccrl.com/computer-chess-rating-list-archives/): Why historical archives matter in computer chess rating lists and how closed events, old tables, PGN packs and winners pages preserve public trust. - [Computer Chess Rating List Conditions](https://ijccrl.com/computer-chess-rating-list-conditions/): A rigorous guide to the conditions readers should check before trusting a computer chess rating list: time control, hardware, openings, tablebases and game count. - [How to Port an Outdated Stockfish-Derived UCI Engine to a Current Stockfish Architecture](https://ijccrl.com/how-to-port-an-outdated-stockfish-derived-uci-engine/): Porting an Outdated Stockfish-Derived UCI Engine to a Current Stockfish Architecture Forensic computer-chess engineering How to Port an Outdated Stockfish-Derived UCI Engine to a Current Stockfish Architecture A rigorous tutorial based on a Mindfish/Pullfish forensic roadmap: why this is an architecture migration, not a banner change and not a simple big-NNUE filename update. Direct answer A real port of an outdated Stockfish-derived UCI engine must migrate coupled subsystems: search, history, threads, NUMA ownership, transposition tables, engine integration, build reproducibility and NNUE loading policy. The audit shows that changing a release name or replacing a network filename is not enough. architecture migration…  - [StockfishJRC- 2.0-150526](https://ijccrl.com/stockfishjrc-2-0-150526/): StockfishJRC-2.0-150526 — Official IJCCRL Release Stockfish-derived • Big NNUE authority updated • Dual-network preserved • Windows/Mingw64 clean package verified 🏆 IJCCRL Verified StockfishJRC-2.0-150526 is the new official IJCCRL verified release for the StockfishJRC line. Relative to StockfishJRC-1.90-060526, this release updates the default big NNUE filename authority from nn-fcf986aea78a.nnue to nn-83a0d6daf7e5.nnue, while preserving the default small NNUE file nn-47fc8b7fff06.nnue and the existing dual-network StockfishJRC architecture. This release is not a broad NNUE topology rewrite, not a migration to the upstream single-network model, and not a search, TT or tablebase patch release. The StockfishJRC big/small NNUE structure remains intact. The release also carries…  - [Wordfish-4.90-140526](https://ijccrl.com/wordfish-4-90-140526/): Wordfish-4.90-140526 — IJCCRL Verified Forensic Release Stockfish-derived • Big NNUE updated to nn-83a0d6daf7e5.nnue • Syzygy TB authority protected • Experience/book safety corrected • Auxiliary Zobrist scope documented • Deterministic per-ARCH Windows EXE/UCI identity preserved 🏆 IJCCRL Verified Wordfish-4.90-140526 supersedes Wordfish-4.80-040526 as the current IJCCRL verified Wordfish release. This version combines the latest audited main/big NNUE network refresh with a broader forensic sanitation of the Wordfish source tree around Syzygy tablebase authority, Experience interaction, book-root safety, PolyGlot en-passant hashing, and the documented role of the auxiliary Wordfish_zobrist.h helper. The release identity has been advanced to Wordfish-4.90-140526 and is embedded both in the…  - [Africaata-V.140526](https://ijccrl.com/africaata-v-140526/): Africaata Bin Book V.140526 — Official IJCCRL Update Polyglot/BIN opening book • append-only expansion audit • wider keyed-position coverage • reinforced practical branching 📘 IJCCRL Verified Africaata Bin Book V.140526 is the new audited Polyglot/BIN release of the Africaata opening book. This update was compared directly against the previous inspected binary, Africaata090326.bin, using file-level book metrics: total records, unique keyed positions, record preservation, root move surface, branching density, checksum, and structural growth. Release facts — current binary Current file: Africaata-V.140526.bin. Previous inspected file: Africaata090326.bin. Book format: Polyglot/BIN, using 16-byte book records. Current file size: 4,923,776 bytes — approximately 4.924 MB /…  - [LesChats-V.1.3-140526](https://ijccrl.com/leschats-v-1-3-140526/): LesChats V.1.3 — Official IJCCRL Opening Book Release Polyglot/BIN opening book • measured structural audit • deeper book surface • controlled practical coverage 📚 IJCCRL Verified LesChats V.1.3 is the new audited release of the IJCCRL opening book, delivered as a Polyglot/BIN book file. This update replaces the previous public LesChats-110326 announcement with a quantified structural audit of the new binary book: file size, number of entries, number of unique keyed positions, root move weights, line density, and a direct 16-ply traversal sample extracted from the book. Release facts (at a glance) Version update: from LesChats-110326 to LesChats V.1.3. Delivered file:…  - [Tablebase Authority Mate Stability](https://ijccrl.com/tablebase-authority-mate-stability/): Tablebase Authority, Mate Stability and Why Some Engine Trees Needed a Defensive Code Audit Recent upstream Stockfish work shows that mate-score stability and decisive endgame behaviour are still active engineering areas, not cosmetic details. Two recent public Stockfish pull requests are especially relevant: These changes are not simply about tablebase probing itself. They concern mate-score retention, search-state behaviour, aborted searches, transposition-table handling and the ability of the engine to preserve decisive information in endgames. The practical lesson for tournament engines is very clear: When Syzygy tablebases are active and the root position is inside the available tablebase cardinality, no external layer…  - [Brainlearnjrc-2.40-110526 — Official IJCCRL Release](https://ijccrl.com/brainlearnjrc-2-40-110526-official-ijccrl-release/): Brainlearnjrc-2.40-110526 — Official IJCCRL Release Big NNUE updated • Dual-net contract preserved • Stockfish dd321af5 aligned • Deterministic CPU builds • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-2.40-110526 supersedes Brainlearnjrc-2.20-030526 as the current IJCCRL verified build. The previous 2.20 release was a targeted engineering release focused on experience-file persistence after completed search and AVX512ICL NNUE compile-path restoration. This new 2.40 release is intentionally narrower: it applies the latest upstream Stockfish big-NNUE default network update from commit dd321af5, while preserving the BrainLearnJRC dual-network architecture and all existing IJCCRL build identity rules. What changed in 2.40 compared with 2.20 The default big…  - [Deepalienist 4.50-110526](https://ijccrl.com/deepalienist-4-50-110526/): Deepalienist-4.50-110526 — Official IJCCRL Release Stockfish-derived • Main NNUE authority update • Dual big/small NNUE preserved • UCI identity updated • Experience disabled by default 🏆 IJCCRL Verified Deepalienist-4.50-110526 is a controlled IJCCRL maintenance release for the Deepalienist line. It continues the forensic sanitation work previously documented in Deepalienist-3.30-280426, while applying a narrow main-network authority update aligned with the supplied Stockfish development snapshot 20260510 / dd321af5. The release does not perform a broad upstream synchronisation, does not rewrite search, does not change the NNUE topology, and does not convert Deepalienist to a single-network Stockfish layout. Its main technical purposes are: updating…  - [Revolution-5.60-100526](https://ijccrl.com/revolution-5-60-100526/): Revolution-5.60-100526 — Official IJCCRL Release Stockfish-derived • Big NNUE filename authority synchronized • Small NNUE preserved • Dual-network layout preserved • IJCCRL Verified 🏆 IJCCRL Verified Revolution-5.60-100526 supersedes Revolution-5.50-260426 as the current IJCCRL-maintained Revolution release. Relative to 5.50, this is a deliberately narrow filename-authority maintenance update: the default big NNUE authority has been synchronized from nn-f68ec79f0fe3.nnue to nn-fcf986aea78a.nnue, following the main-network filename authority introduced by official Stockfish commit 5095cd16c97e7596f2d2a02eb05ed8e030af991f. This release should not be described as a speculative strength patch, an evaluation redesign, a new NNUE topology, or a broad Stockfish resynchronisation. The evidenced source delta is limited to the active…  - [Chess Engine Audit Trails: From Game Logs to Elo Tables](https://ijccrl.com/chess-engine-audit-trails-from-game-logs-to-elo-tables/): A chess engine audit trail connects raw games, PGN files, incidents, rating tools and published Elo tables. - [Why Winners Pages Matter in Chess Engine Ratings](https://ijccrl.com/why-winners-pages-matter-in-chess-engine-ratings/): A winners page is not a rating list. It records champions and protects historical clarity. - [Original UCI Engine Tournaments and Public Rating Trust](https://ijccrl.com/original-uci-engine-tournaments-and-public-rating-trust/): Original UCI tournaments need their own rating surfaces because their value is different from derivative-engine testing. - [Official Chess Engine Tournaments and Rating Evidence](https://ijccrl.com/official-chess-engine-tournaments-and-rating-evidence/): An official chess engine tournament is not only a set of games; it is a publication chain. - [Clean PGN Packs for Chess Engine Rating Lists](https://ijccrl.com/clean-pgn-packs-for-chess-engine-rating-lists/): A clean PGN pack is not just a download file. It is the evidence layer behind a rating surface. - [Mirror Openings in Chess Engine Tournaments](https://ijccrl.com/mirror-openings-in-chess-engine-tournaments/): Mirrored openings are one of the simplest ways to make chess engine tournaments easier to audit and easier to interpret. - [Live Tournaments and Rating Publication](https://ijccrl.com/live-tournaments-and-rating-publication/): Live Tournaments and Rating Publication Live chess engine tournaments are not only public broadcasts. In a serious computer-chess publication system, they are the first visible layer of a longer evidence chain. A game is played live, the result is recorded, the PGN becomes supporting material, the event produces standings, the standings may affect rating publication, and the closed event is eventually preserved through downloads, winners pages and archive entries. This is why live tournaments matter for readers of chess engines ratings lists. A rating table becomes more useful when the reader can understand where the results came from, how the event…  - [SirioC Roadmap](https://ijccrl.com/sirioc-roadmap/): IJCCRL Engineering Roadmap · SirioC UCI Chess Engine · Original Development Track SirioC Roadmap: Building an Original UCI Chess Engine with a Proprietary NNUE Future This page presents the IJCCRL technical roadmap for SirioC: an original CPU UCI chess engine project that is being audited, refactored and prepared for a long-term transition from a classical and linear evaluation baseline toward a real proprietary NNUE architecture and a stronger alpha-beta search layer. Roadmap status Originality-first engineering process. No Elo or strength claim before controlled testing. Target direction: stronger CPU alpha-beta search plus proprietary NNUE. IJCCRL home Ratings lists ProjectSirioC Engine typeUCI /…  - [How to Use Engine Rating Lists Responsibly](https://ijccrl.com/how-to-use-engine-rating-lists-responsibly/): Use Engine Rating Lists Responsibly Chess engine rating lists are useful only when they are read with discipline. A table of engines, Elo values, game counts and ranks can help readers understand relative performance, but it can also be misused. The mistake is usually not the rating list itself. The mistake is treating a rating number as if it were an absolute truth, independent of time control, hardware, openings, opponent pool, sample size and calculation method. This matters for readers of chess engines ratings lists because modern computer chess is full of strong engines separated by relatively small margins. A difference…  - [StockfishJRC- 1.90-070526](https://ijccrl.com/stockfishjrc-1-90-070526/): StockfishJRC-1.90-060526 — Official IJCCRL Release Stockfish-derived • Big NNUE authority update • Dual-network preserved • Windows/Mingw64 architecture package verified 🏆 IJCCRL Verified StockfishJRC-1.90-060526 is the new official IJCCRL verified release for the StockfishJRC line. Relative to StockfishJRC-1.80-240426, this release updates the default big NNUE filename authority from nn-f68ec79f0fe3.nnue to nn-fcf986aea78a.nnue, while preserving the default small NNUE file nn-47fc8b7fff06.nnue and the existing dual-network architecture. This release is not a broad NNUE topology rewrite and not a migration to the upstream single-network model. The StockfishJRC big/small NNUE structure remains intact. The release also carries the official 1.90-060526 identity update and includes a verified…  - [How Tournament Structure Affects Ratings](https://ijccrl.com/how-tournament-structure-affects-ratings/): Tournament Structure Affects Ratings Tournament structure affects how engine ratings should be interpreted. A chess engine rating is not produced in a vacuum. It is shaped by the opponents faced, the number of games played, the time control, the opening policy, the stage of the event, the qualification system, and the statistical model used to convert results into rating estimates. That is why tournament structure engine ratings is not a cosmetic topic. It is central to reading chess engine performance responsibly. For readers of chess engines ratings lists, the key point is simple: a league table, a knockout bracket, a final,…  - [Why Provisional Rating Lists Matter](https://ijccrl.com/why-provisional-rating-lists-matter/): Provisional Rating Lists Matter Provisional chess engine rating lists exist because live competition does not wait for a perfect final dataset. During an active event, readers want to know what is happening now: which engines are performing above expectation, which engines are falling behind, how the current standings relate to rating estimates, and whether the tournament is beginning to reshape the competitive picture. A provisional list answers those questions, but it must do so with discipline. That discipline matters for anyone reading chess engines ratings lists. A provisional rating is not the same as a final rating. It is an interim…  - [How to Compile Windows-Compatible Stockfish 18 Binaries on Ubuntu](https://ijccrl.com/how-to-compile-windows-compatible-stockfish-18-binaries-on-ubuntu/): Introduction Compiling a Windows-compatible chess-engine binary on Ubuntu is a standard cross-compilation task: the build host is Linux, but the output executable targets Microsoft Windows. In the case of Stockfish 18, this is especially practical because the official Stockfish source tree already provides a Makefile-based build system with architecture and compiler selectors, including the COMP=mingw path documented by the Stockfish project. The official Stockfish compilation guide gives examples such as make -j <n_jobs> profile-build ARCH=x86-64-avx2 COMP=mingw, which is the relevant mechanism for generating Windows binaries from a non-Windows environment. Stockfish 18 itself is a major official release announced on 31 January…  - [Wordfish-4.80-040526](https://ijccrl.com/wordfish-4-80-040526/): Wordfish-4.80-040526 — IJCCRL Verified NNUE Refresh Stockfish-derived • Main/big NNUE updated to nn-fcf986aea78a.nnue • Small NNUE preserved • Dual-network structure intact • Deterministic per-ARCH EXE/UCI identity preserved 🏆 IJCCRL Verified Wordfish-4.80-040526 supersedes Wordfish-4.70-130426 as the current IJCCRL verified build. This release is based on the official Stockfish development commit 5095cd16c97e7596f2d2a02eb05ed8e030af991f. It does not redefine the Wordfish search layer, move generator, legality logic, UCI semantics, architecture suffix model, or deterministic executable identity discipline. Its technical scope is deliberately limited to the official main/big NNUE network update, the corresponding upstream author attribution, and the public release identity update to Wordfish-4.80-040526. What changed in…  - [What Elo Means in Computer Chess](https://ijccrl.com/what-elo-means-in-computer-chess/): If you read computer chess reports regularly, you will see Elo everywhere. Engines gain Elo, lose Elo, defend Elo, or appear in rating tables with large numerical gaps between them. The term is widely used, but it is also widely misunderstood. In many discussions, Elo is treated as if it were an absolute measure of strength, almost like a fixed physical property. In practice, that is not what Elo means in engine testing. In computer chess, Elo is best understood as a relative estimate of playing strength derived from results. It is not a timeless truth about an engine in isolation.…  - [Brainlearnjrc-2.20-030526 — Official IJCCRL Release](https://ijccrl.com/brainlearnjrc-2-20-030526-official-ijccrl-release/): Brainlearnjrc-2.20-030526 — Official IJCCRL Release Experience persistence restored • AVX512ICL NNUE compile path fixed • AVX512 family preserved • Deterministic CPU builds • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-2.20-030526 supersedes Brainlearnjrc-2.10-180426 as the current IJCCRL verified build. The previous 2.10 release was a narrow upstream legality-maintenance sync: it ported the Stockfish-side simplification of the en passant legality path in src/position.cpp. This new 2.20 release has a different objective: it corrects two practical engineering areas that matter directly for real tournament use and modern binary packaging — persistent experience-file writing after completed search and AVX512ICL NNUE build-path correctness. What changed…  - [How to Compare Chess Engines Fairly](https://ijccrl.com/how-to-compare-chess-engines-fairly/): How to Compare Chess Engines Fairly Comparing chess engines sounds simple until the details are examined closely. One engine scores better in a match, another has a higher Elo in a public list, and a third performs strongly in a different tournament format. At first glance, these facts may appear to describe the same thing. In practice, they often do not. A fair comparison requires much more than putting two engines side by side and reading a final score. For readers who follow chess engines ratings lists, the central issue is methodological discipline. A rating, a match result, or a tournament…  - [Sample Size in Chess Engine Rating Lists](https://ijccrl.com/how-many-games-make-a-rating-list-useful/): Sample Size in Chess Engine Rating Lists Chess engine rating lists are useful only when readers understand what the numbers can and cannot say. A rating is not a decorative label attached to an engine. It is a statistical estimate derived from game results, tournament conditions, opponent distribution, time control, hardware assumptions, opening policy, and rating methodology. For that reason, sample size is one of the most important concepts in any serious discussion of computer chess ratings. In simple terms, sample size means the number of games used to estimate an engine’s strength. In a chess engine rating list, this may…  - [Original UCI vs Stockfish-Derived Engines](https://ijccrl.com/original-uci-vs-stockfish-derived-engines/): Original UCI vs Stockfish-Derived Engines In computer chess, one of the most common editorial errors is to treat all UCI engines as if they belonged to the same development category. They do not. The UCI protocol defines how a chess engine communicates with a graphical user interface, but it does not describe the internal architecture, search logic, evaluation model, or code provenance of the engine itself. For readers of engine rating lists, tournament reports, and audit pages, this distinction matters. A list of engines that all speak UCI is not automatically a list of engines built in the same way, nor…  - [Reckless 0.10.0-dev — Windows x86_64 Development Build](https://ijccrl.com/reckless-0-10-0-dev-windows-x86_64-development-build/): IJCCRL • Downloads • Reckless Development Build Reckless 0.10.0-dev — Windows x86_64 Development Build This IJCCRL package provides unofficial Windows x86_64 builds of Reckless 0.10.0-dev for testing, engine tournaments and comparative analysis. It is not an official final 0.10.0 release from the upstream author. The package contains AVX2 and generic binaries compiled locally from the current Reckless development source snapshot, with Syzygy/Fathom support enabled and validated through UCI startup and bench execution. Windows x86_64 AVX2 + generic Syzygy/Fathom enabled Development snapshot Not an official final release Download package The archive contains two Windows executables, a README file and the AGPL-3.0 license…  - [Bayeselo and Ordo in Computer Chess](https://ijccrl.com/bayeselo-and-ordo-in-computer-chess/): Bayeselo Ordo computer chess Chess engine rating lists look simple on the surface. A table displays engine names, Elo values, scores, and positions in the ranking. Readers may then assume that the list is a direct and neutral reflection of engine strength. In practice, rating lists are the result of a method, and the method matters. The same PGN dataset can be processed in different ways, and different tools can embody different modelling assumptions, output conventions, and practical workflows. For readers of chess engines ratings lists, one of the most useful methodological distinctions is the difference between Bayeselo and Ordo. Both…  - [Deepalienist-3.30-280426](https://ijccrl.com/deepalienist-3-30-280426/): Deepalienist-3.30-280426 — Official IJCCRL Release Stockfish-derived • Forensic code sanitation • Stockfish 20260426 patch alignment • Big net nn-f68ec79f0fe3.nnue • Experience disabled by default 🏆 IJCCRL Verified Deepalienist-3.30-280426 is a controlled IJCCRL maintenance and sanitation release. The purpose of this version is not to retune the engine, rewrite search, or perform a broad upstream Stockfish synchronisation. The release focuses on a narrow set of objectively identified technical issues: alignment with the supplied Stockfish development snapshot 20260426 / 1a882efc, correction of a quiescence-search transposition-table write path, removal of the obsolete double_inc_update NNUE accumulator path, safer tournament defaults for the BrainLearn-style Experience subsystem,…  - [IJCCRL Arena 2026 Bullet Derived Stockfish-MR1- Results](https://ijccrl.com/ijccrl-arena-2026-bullet-derived-stockfish-mr1-results/): IJCCRL • Chess Engines Ratings Lists • Bullet • Derived Stockfish Track Chess Engines Ratings Lists: Revolution defeats Wordfish in the III SE IJCCRL Bullet Cup 2026 Round of 16 — Match 1 This post records the audited result of the first Round-of-16 match of the III SE IJCCRL Bullet Cup 2026 on the Derived Stockfish Track. The purpose is not only to publish the result itself, but also to place that result inside a technically interpretable framework of match structure, colour balance, mirrored-opening procedure, and audit closure. Keyword focus: chess engines ratings lists Round of 16 — Match 1 Bullet…  - [Why Time Control Changes Engine Rankings](https://ijccrl.com/why-time-control-changes-engine-rankings/): Time Control Changes Engine Rankings Chess engine rankings are often read as if they were universal measures of strength. A table places one engine above another, assigns an Elo value, and gives the impression of a stable hierarchy. In reality, engine rankings are always connected to the conditions under which the games were played. One of the most important of those conditions is time control. A ranking produced from bullet games does not measure exactly the same environment as a ranking produced from blitz games. A classical ranking, in turn, should not be collapsed into the same meaning as a fast-time-control…  - [Revolution-5.50-260426 ](https://ijccrl.com/revolution-5-50-260426/): Revolution-5.50-260426 — Official IJCCRL Release Stockfish-derived • Big NNUE default update • Upstream accumulator cleanup • FMA3 release-build contract preserved 🏆 IJCCRL Verified Revolution-5.50-260426 is the current IJCCRL-maintained Stockfish-derived release. Relative to Revolution-5.40-190426, this version is a controlled maintenance update centred on two technical areas: the migration of the default big NNUE file to the current upstream line, and a narrow semantic port of the official Stockfish development commit 1a882efc7fc22b3b16893a406e6060916022fcc4, titled “Simplify out double_inc_update”. This release should not be read as a speculative engine redesign. It is a source-maintenance release that keeps the established Revolution identity model, updates the active big…  - [IJCCRL — Chess Engines Ratings Lists — Classical Original UCI](https://ijccrl.com/ijccrl-chess-engines-ratings-lists-classical-original-uci/): IJCCRL • Chess Engines Ratings Lists • Classical • Original UCI Track Chess Engines Ratings Lists: IJCCRL Arena Series 2026 Classical Provisional Update for the Original UCI Track The IJCCRL Arena Series 2026 — Classical — Original UCI Track — League Stage remains in progress. This post records the audited provisional Classical rating surface after 140 completed games from the planned 180-game round robin, including the current Elo base 3500 table, colour-balance state, and the treatment of three technical interruption records. Keyword focus: chess engines ratings lists Classical 40m+2s Original UCI Track Audited provisional Base Elo 3500 140 / 180 games…  - [What Makes a Chess Engine Rating List Reliable](https://ijccrl.com/what-makes-a-chess-engine-rating-list-reliable/): Chess Engine Rating List Reliable A chess engine rating list can look authoritative even when the evidence behind it is weak. A table may contain engine names, Elo values, ranks, game counts, and sometimes error margins, but the presence of numbers alone does not make the list reliable. A reliable chess engine rating list is not defined only by its appearance. It is defined by the quality of its testing conditions, the transparency of its methodology, the volume and structure of its data, and the clarity with which it communicates uncertainty. This distinction is essential for readers of chess engines ratings…  - [IJCCRL Arena Series 2026 Bullet Derived Stockfish League Results](https://ijccrl.com/ijccrl-arena-series-2026-bullet-derived-stockfish-league-results/): IJCCRL • Chess Engines Ratings Lists • Bullet • Derived Stockfish Track Chess Engines Ratings Lists: Official IJCCRL Arena Series 2026 Bullet Results for the Derived Stockfish Track The IJCCRL Arena Series 2026 — Bullet — Derived Stockfish Track — League Stage is now closed and fully audited. This post records the official Bullet rating outcome of the event, the final league table, the audit status, and the competitive position of the regular-season winner in relation to the rest of the field. Keyword focus: chess engines ratings lists Bullet 60+2 Derived Stockfish Track Audit status: PASS Base Elo 3700 In discussions…  - [How to Read Chess Engine Rating Lists](https://ijccrl.com/how-to-read-chess-engine-rating-lists/): How to Read Chess Engine Rating Lists Chess engine rating lists are often treated as if they were self-explanatory. A reader opens a table, sees a ranking, notices an Elo value, and assumes that the list has already answered the essential question of strength. In reality, a serious rating list is not merely a sorted table. It is the visible output of a testing environment, a calculation method, a game sample, and a set of publishing decisions about how relative strength should be measured and communicated. CCRL, for example, does not present only an ordered list of engines; it also states…  - [Powershell on page seo homepage audit](https://ijccrl.com/powershell-on-page-seo-homepage-audit/): PowerShell for On-Page SEO: A Technical Methodology for Auditing and Improving a Homepage On-page SEO is often discussed as an editorial discipline, but for a technically managed website it should also be treated as an auditable engineering process. A homepage is not merely a visual entry point. It is a structured document, a semantic hub, a navigational surface, a source of internal signals, and a technical object that search engines must be able to crawl, interpret, classify, and relate to the rest of the site. For a project such as IJCCRL, where the homepage has to connect live chess engine tournaments,…  - [StockfishJRC- 1.80-190426](https://ijccrl.com/stockfishjrc-1-80-190426/): StockfishJRC-1.80-240426 — Official IJCCRL Release Stockfish-derived • Default big NNUE filename update • Single-file maintenance sync • No NNUE logic rewrite 🏆 IJCCRL Verified StockfishJRC-1.80-240426 is the new IJCCRL verified maintenance release for the StockfishJRC line. Relative to StockfishJRC-1.70-180426, this is a strictly narrower default-NNUE maintenance correction. The previous release was a rules-side upstream sync centred on the legality-path simplification in src/position.cpp. By contrast, StockfishJRC-1.80-240426 is intentionally confined to a single-file update in src/evaluate.h, replacing the older default big NNUE filename nn-7bf13f9655c8.nnue with nn-f68ec79f0fe3.nnue, while preserving the default small NNUE file nn-47fc8b7fff06.nnue. How this release differs from StockfishJRC-1.70-180426 The previous release…  - [IJCCRL Arena Series 2026 — Bullet — League Stage](https://ijccrl.com/ijccrl-arena-series-2026-bullet-league-stage/): IJCCRL • Bullet 60s+2s • Derived Stockfish Track • 2026 IJCCRL Arena Series 2026 — Bullet — Derived Stockfish Track — League Stage Provisional audit and rating update for the currently published segment of the Bullet League Stage. The published material covers 751 completed games out of 918 scheduled in the full 18-engine round robin. Under the event format actually in use, the published segment currently reads as a PASS-WARN provisional audit: mirrored pairing integrity remains structurally consistent, no duplicate games were detected in the published segment, colour balance remains valid for the current cursor, and termination plus tablebase evidence are…  - [IJCCRL Arena Series 2026 — Classical — Original UCI Track — League Stage](https://ijccrl.com/ijccrl-arena-series-2026-classical-original-uci/): IJCCRL • Classical 40m+2s • Original UCI Track • 2026 IJCCRL Arena Series 2026 — Classical — Original UCI Track — League Stage Provisional audit update for the currently published segment of the Classical League Stage. The published material covers 70 completed games out of 180 scheduled in the full 10-engine round robin. Under the event format actually in use, the published segment currently reads as an interim audit PASS: mirrored pairing integrity remains structurally consistent, no duplicate games were detected in the published segment, colour balance is exact at the current cursor, and termination plus tablebase evidence are recorded in…  - [IJCCRL Arena Series 2026 — Bullet — Derived Stockfish - provisional standings](https://ijccrl.com/ijccrl-arena-series-2026-bullet-derived-stockfish-provisional-standings/): IJCCRL • Provisional Bulletin • Derived Stockfish Track IJCCRL Arena Series 2026 — Bullet — Derived Stockfish Track — League Stage This bulletin summarises the current published segment of the League Stage. The event remains in progress. The ranking below is provisional, the audit verdict applies only to the currently published dataset, and the Elo figures are provisional Ordo-style estimates rebased to 3700 for the Bullet track. 18 engines Bullet 60+2 Fixed mirrored openings Interim audit: published segment passes Provisional standings Scope of this bulletin The current published segment contains 229 completed games out of the scheduled 918. That corresponds to…  - [IJCCRL Live Broadcast: Stable Real-Time Relay Across Multiple Time Controls](https://ijccrl.com/ijccrl-live-broadcast-stable-real-time/): IJCCRL Native Broadcast: Current Live Time-Control Coverage and Interaction Layer The IJCCRL broadcast infrastructure is currently operating with verified live support for three time controls: 60s+2, 300s+2 and 40m+2. This is not a static game viewer. It is a native custom relay environment built to support real-time UCI engine tournament transmission with parallel public deployment. At present, two live public environments are online: Elite, dedicated to original engines Live, dedicated to Stockfish-derived engines The operating objective is straightforward: maintain a stable relay stack for live engine competition while progressively consolidating a readable and interactive public-facing environment. Current Verified Functional Scope Native…  - [brainlearnjrc-2.10-180426](https://ijccrl.com/brainlearnjrc-2-10-180426/): Brainlearnjrc-2.10-180426 — Official IJCCRL Release Upstream b1fb50ae port • Simplified en passant legality check • Single-file maintenance sync • Deterministic hyphenated CPU builds preserved • Stockfish-derived • IJCCRL Verified 🏆 IJCCRL Verified Brainlearnjrc-2.10-180426 supersedes Brainlearnjrc-2.00-070426 as the current IJCCRL verified build. If 2.00 was the release that moved the fork onto the official SFNNv14 big-net baseline, updated pawn-push threat indexing, aligned FullThreats / position threat bookkeeping, and preserved the deterministic hyphenated per-CPU identity model, then 2.10 is intentionally much narrower: it is a single-file upstream legality-maintenance release that ports the latest Stockfish simplification removing the special-case EN_PASSANT legality branch from Position::legal(Move…  - [StockfishJRC- 1.70-180426](https://ijccrl.com/stockfishjrc-1-70-180426/): StockfishJRC-1.70-180426 — Official IJCCRL Release Stockfish-derived • Upstream b1fb50ae port • Simplified en passant legality check • Single-file maintenance sync 🏆 IJCCRL Verified StockfishJRC-1.70-180426 is the new IJCCRL verified maintenance release for the StockfishJRC line. Relative to StockfishJRC-100426, this is a strictly narrower upstream rules-maintenance update. The previous release was a broader multi-file sync centred on SFNNv14, FullThreats expansion, pawn push-or-attack threat logic, and the upstream qsearch TT correction. By contrast, StockfishJRC-1.70-180426 is intentionally confined to a single-file port in src/position.cpp, implementing the upstream simplification that removes the special-case en passant legality branch from Position::legal(Move m) const. How this release differs…  ## Pages - [Deepalienist-5.70-230926](https://ijccrl.com/deepalienist-5-70-230926/): Deepalienist-5.70-230926 — IJCCRL Lifetime / Platinum Engines Release Stockfish-dev topology through Sep22 • NNUE nn-134a887f4c8f • Universal clean-build closure • architecture-aware UCI identity 🏆 IJCCRL Verified Deepalienist-5.70-230926 is the current IJCCRL-maintained Deepalienist release for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. It supersedes Deepalienist-5.60-280826, the release documented by the previous version of this HTML block. The change from 5.60 to 5.70 is not a cosmetic rebrand. The maintained tree has moved from the former Stockfish-dev August 25 endpoint to the validated September 22 endpoint 0a215d6c9e48856ef630013b8ab8312941a59057. The intervening Stockfish-dev topology was audited and integrated chronologically, while…  - [REVOLUTION-6.40-150926](https://ijccrl.com/revolution-6-40-150926/): Revolution-6.40-150926 — Official IJCCRL Release Stockfish-derived • Strict single-net • Stockfish-dev Sep 13 topology • Windows Universal + SSE4.1/POPCNT verified • zero warnings / zero errors ✓ IJCCRL Verified Revolution-6.40-150926 supersedes Revolution-6.10-310726 as the current IJCCRL-maintained Revolution release. The update is substantially larger than an identity change: the maintained source line was advanced chronologically from the July 26 Stockfish-dev topology to the accepted September 13, 2026 endpoint 031dfeb437fa6b06cdbdf4ef89dfb82f6b83c4d3, the active NNUE was changed from nn-ab28990d4ea3.nnue to nn-134a887f4c8f.nnue, multiple search, time-management, platform and CI changes were integrated, and a historical Windows std::filesystem prerequisite was finally completed before closing the Universal build. This…  - [Brainlearnjrc-3.20-060926](https://ijccrl.com/brainlearnjrc-3-20-060926/): Brainlearnjrc-3.20-060926 — Stockfish 19 Topology Closure • SSE41/POPCNT + x86-64 Universal Official Stockfish 19 endpoint • edb0d9db • nn-1a298aa575a0.nnue • 0 warnings / 0 errors / 0 linker blockers ✅ IJCCRL Accepted Brainlearnjrc-3.20-060926 is the current accepted BrainLearnJRC release and supersedes Brainlearnjrc-3.10-310826. The maintained derivative tree has advanced from the 29 August 2026 Stockfish development endpoint to the official Stockfish 19 release endpoint of 5 September 2026, ending at edb0d9db6731067ec50ce619ff372b463bc4dd5d, while preserving BrainLearnJRC Book, Learn, Experience, Zobrist, Syzygy, local WDL, sparsehash, NNUE and Universal build infrastructure. The principal difference from the release documented in the previous HTML is therefore not a…  - [Brainlearnjrc-3.10-310826](https://ijccrl.com/brainlearnjrc-3-10-310826/): Brainlearnjrc-3.10-310826 — SSE41/POPCNT + x86-64 Universal Release Stockfish dev topology through 29 August 2026 • 8bc5caa2 • nn-1a298aa575a0.nnue • 0 warnings / 0 errors ✅ IJCCRL Accepted Brainlearnjrc-3.10-310826 is the current accepted BrainLearnJRC release and supersedes Brainlearnjrc-3.10-120826. The maintained derivative tree has been reconciled against the Stockfish development line through 29 August 2026, ending at the exact upstream target 8bc5caa2e4b1d4c189b1428e93158b10d3edb0b6, while preserving BrainLearnJRC learning, Book, Experience, Zobrist, Syzygy, WDL, sparsehash and maintained UCI extensions. The new release advances the upstream source topology by nineteen days, changes the default NNUE from nn-ab28990d4ea3.nnue to nn-1a298aa575a0.nnue, incorporates the intervening Stockfish memory, threading, Syzygy, search…  - [Deepalienist-5.60-280826](https://ijccrl.com/deepalienist-5-60-280826/): Deepalienist-5.60-280826 — IJCCRL Lifetime / Platinum Engines Release Stockfish-dev topology through Aug25 • NNUE nn-1a298aa575a0 • Universal release closure • SSE4.1/POPCNT PGO validation 🏆 IJCCRL Verified Deepalienist-5.60-280826 is the current IJCCRL-maintained Deepalienist release for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. It supersedes Deepalienist-5.40-080826, the release documented by the previous version of this HTML block. This update is materially larger than a version-number change. The maintained Deepalienist tree was advanced through the later validated Stockfish-dev topology and closed at 2edd935bbb3ea6e484a1700f582a95e0ee773ec2 from August 25, 2026. The final two audited temporal blocks, August 24 and August 25,…  - [Deepalienist-5.40-080826](https://ijccrl.com/deepalienist-5-40-080826/): Deepalienist-5.40-080826 — IJCCRL Lifetime / Platinum Engines Release Stockfish-dev topology through Aug3 • NNUE nn-ab28990d4ea3 • SSE4.1/POPCNT PGO validation • AVX2/BMI2 release binaries • Corrected author identity 🏆 IJCCRL Verified Deepalienist-5.40-080826 is the current IJCCRL-maintained Deepalienist release for Lifetime Membership, users with a higher access level, Platinum and monthly Platinum subscribers. It supersedes Deepalienist-5.30-220726, which is the release documented by the previous version of this HTML block. The new release closes the validated Stockfish-dev chronology through stockfish-dev-20260803-762dd1da, changes the active NNUE to nn-ab28990d4ea3.nnue, preserves Deepalienist’s Book, Experience, learning, Zobrist, Syzygy and sparsehash subsystems, and completes the independent release rebrand to Deepalienist-5.40-080826.…  - [Wordfish-5.20-040826](https://ijccrl.com/wordfish-5-20-040826/): Wordfish 5.20-040826 — Exact Stockfish-dev Alignment & Evaluation-Correctness Closure Stockfish-derived • Release ID unchanged • Exact target: stockfish-dev-20260803-762dd1da • Default NNUE: nn-ab28990d4ea3.nnue • Protected Wordfish overlay preserved ✓ IJCCRL Verified Wordfish-5.20-040826 remains the public UCI and package identity of the current IJCCRL-verified Wordfish release. The release ID has intentionally not been changed. What changed is more important than a cosmetic version increment: the Stockfish-derived portion of the source tree was forensically reconstructed against the exact authority stockfish-dev-20260803-762dd1da (762dd1da9a5db458180b2c5db6c53dc40ec61e1a) and the protected Wordfish functionality was then rebased on top of that exact target. The reconstruction was required because the earlier 5.20 tree…  - [Revolution-6.10-310726](https://ijccrl.com/revolution-6-10-310726/): Revolution-6.10-310726 — Official IJCCRL Release Stockfish-derived • Strict single-net • SFNNv16 • PP_3Wide • Stockfish-dev Jul 26 topology • Windows SSE4.1/POPCNT and AVX2 verified ✓ IJCCRL Verified Revolution-6.10-310726 supersedes Revolution-6.0-040526 as the current IJCCRL-maintained Revolution release. Relative to the version documented by the previous HTML, the maintained source line advances from the controlled Stockfish-dev baseline through July 3, 2026 to the accepted topology through July 26, 2026, updates the active NNUE from nn-0ee0657fb25e.nnue to nn-ab28990d4ea3.nnue, moves the evaluation architecture from SFNNv15 to SFNNv16, and integrates PP_3Wide plus the hybrid accumulator path. This is a controlled source-maintenance, topology-integration, identity and build-validation release.…  - [IJCCRL PGN Games History](https://ijccrl.com/pgn-games-history/): IJCCRL PGN Games History — Downloadable Chess Engine PGN Archive IJCCRL • PGN Games History • Generated Archive IJCCRL PGN Games History Historical IJCCRL index of downloadable chess engine PGN games, event packs, track statistics, time-control totals and ECO distribution generated from the local downloads archive. Generated: 2026-06-07T13:20:07+00:00 Source: downloads/ No invented statistics Total games7693 Download packs56 PGN files110 ZIP files56 Warnings0 games-history.json games-history.csv eco-summary.csv download-packs.csv ECO A–E distribution ECO group Games Percent A 4006 52.07% B 2340 30.42% C 915 11.89% D 152 1.98% E 280 3.64% Unknown 0 0.00% Method note This page is generated from downloadable PGN material…  - [IJCCRL-SUITE-2026 MASTER — Opening Test Suite](https://ijccrl.com/ijccrl-suite-2026-master-opening-test-suite/): IJCCRL-SUITE-2026 MASTER: A–E 2200–2800 Opening Test Suite for Computer Chess IJCCRL-SUITE-2026 MASTER is the first consolidated IJCCRL opening-suite surface prepared for future IJCCRL engine tournaments. It covers ECO files A–E, uses decisive human games from the 2200–2800 Elo range, cuts every accepted line after eight full moves, removes duplicate final positions by FEN, and stores a Stockfish 18 depth-8 evaluation for each final position. Authorship and ownership notice: IJCCRL-SUITE-2026 is an IJCCRL opening-suite project authored, owned and maintained by Jorge Ruiz Centelles. The suite is published for technical use, review and testing by the international computer-chess community. If it is used…  - [IJCCRL Lifetime Membership — Tools, Downloads and Computer-Chess Support](https://ijccrl.com/lifetime-membership/): IJCCRL • Lifetime Membership Support the IJCCRL computer-chess infrastructure and access the member-only technical layer. IJCCRL Lifetime Membership is designed for users who want more than passive viewing. It supports the development and maintenance of the IJCCRL live broadcast ecosystem, rating publication work, PGN processing tools, private releases and premium identity features inside the project. The public broadcast, rating surfaces and tournament records remain open as part of the IJCCRL project. Lifetime Membership adds a stronger support layer for users who want direct access to selected tools, member-only downloads and long-term project continuity. View Membership Levels Explore IJCCRL Tools Member-only tools…  - [Classical Rating List — IJCCRL Arena Series — Derived Stockfish Track](https://ijccrl.com/classical-rating-list/): IJCCRL • Classical Rating List • Derived Stockfish Track Classical Rating List — Audited League Closure, Q16 & Q8 The Classical league has been closed on a balanced audited corpus of 920 games, with 92 games per engine, 46 with White and 46 with Black, 460 mirrored units and pair ratio 0. HypnoS has subsequently been excluded from the published rating list and Q16 eligibility because the required public source-code reference could not be established. Brainlearn31 enters Q16 as the designated replacement. Q16 is now in its final scheduled match. Q16_M1 between Deepalienist and BrainlearnJRC was audited as a 10.0–10.0 draw…  - [Ratings Lists](https://ijccrl.com/ratings-lists/): IJCCRL • Rating Lists • IJCCRL Arena Series Rating Lists This page is the rating hub of the IJCCRL chess engines ratings lists ecosystem. It preserves the split between the Derived Stockfish Track and the Original UCI Track, separates rating surfaces by time control, and exposes the rating publication status without pretending scientific closure where the underlying match base is still provisional, event-bound or under rebuild. IJCCRL Arena Series Two-track structure Time-control split Controlled rebuild May 2026 status loaded Reading rule Rating lists are technical publication surfaces, not promotional pages. They must state track, time control, status, sample maturity and methodological…  - [Events](https://ijccrl.com/events/): IJCCRL • Events • Arena Series Events The IJCCRL Events hub is the operational map for active and scheduled chess engine tournaments. It separates Original UCI Track and Derived Stockfish Track activity, points users to live broadcasts, and routes closed material toward Archive, Downloads, Winners, Rating Lists and PGN Games History. Operational hub Current cycle Official calendar Track-aware routing No full PGN inventory here Open IJCCRL Broadcast Open Rating Lists Open Archive Current cycle Live routing Original UCI Track — Main international track The Original UCI Track is the primary IJCCRL competition lane for original UCI engines. Active events should route…  - [IJCCRL Rewards](https://ijccrl.com/ijccrl-rewards/): IJCCRL Rewards IJCCRL Rewards IJCCRL Rewards provide a structured entry point for user retention inside the broadcast. Weekly rewards Registered users may enter announced weekly rewards. Rewards can include a temporary Premium Pass. Temporary Premium Pass A 30-day Premium Pass may be granted manually from admin or through an announced reward. Rewards do not transfer ownership of the software or the broadcast. Eligibility Guests should register first to enter announced weekly rewards. Premium remains a separate support entitlement. - [IJCCRL Premium — Broadcast Identity, Chat Features and Member Support](https://ijccrl.com/ijccrl-premium/): IJCCRL • Premium Identity Premium is the visible support layer inside the IJCCRL broadcast. IJCCRL Premium gives supporting users a clearer identity inside the broadcast environment. It is designed for users who want to participate in the live layer with visible support status, expanded chat interaction and eligibility for announced premium-oriented community features. Premium does not compete with Lifetime Membership. It reinforces it. Lifetime Membership is the broader support and access layer for selected tools, private releases and technical resources. Premium is the visible community layer inside the broadcast. View Lifetime Membership View Membership Levels Visible identity Premium chat layer Expanded…  - [IJCCRL Broadcast](https://ijccrl.com/ijccrl-broadcast/): IJCCRL • Live • IJCCRL Arena Series IJCCRL Live This page is the public launch surface into the live environments of the IJCCRL Arena Series. It preserves the split between the Derived Stockfish Track and the Original UCI Track, routes users directly to the two broadcast URLs, and explains the interaction model without drifting into generic promotional language. IJCCRL Arena Series Two live environments Track-aware Native relay stack Live model Two parallel broadcast environments. One lane for the Derived Stockfish Track. One lane for the Original UCI Track. Cross-links to Events, Archive, Winners, Downloads and Rules & Audit. Interaction model Watch…  - [Playchess machines room A tournmanet](https://ijccrl.com/playchess-machines-room-a-tournmanet/): IJCCRL — Desvelemosafrica’s Suizo | PGN Audit and Current Classification Current database summary for 2026.04.28. The supplied PGN contains 38 recorded games: 35 draws and 3 decisive games. This post reports only the results contained in the supplied file. ♟️ PGN AUDIT / SWISS BLITZ Event: Desvelemosafrica’s Suizo Site: Machines A Detected format: Swiss (blitz) Date: 2026.04.28 Rounds: 1–19 PGN games: 38 Detected nicks: 5 🏆 Current score leader Desvelemosafrica Deepalienist-4.30-28 Score: 10.0 / 19 Result line: 1-18-0 Colours: 10W / 9B Status: SOLE LEADER IN THE SUPPLIED PGN 📦 PGN download Current supplied database Neutral download reference Games: 38 Decisive…  - [Tool pgn to graph](https://ijccrl.com/tool-pgn-to-graph/): IJCCRL • Windows App • PGN Graph Beta IJCCRL PGN Graph Beta — Engine Report & Workbook Export Release The current IJCCRL PGN Graph build moves beyond basic match plotting and introduces a more practical engine-centric reporting workflow. Users can now load a PGN database, inspect a selected engine, generate publication-ready graphs, and export a structured Excel workbook (.xlsx) with the report table and the graphs embedded in the same file. The goal of this phase is simple: a tool that users can operate directly for tournament work without depending on external assistance. Windows beta validated Engine report workflow PNG /…  - [IJCCRL TOOLS](https://ijccrl.com/ijccrl-tools/): IJCCRL • Tools Practical computer-chess tools for PGN, ratings and tournament workflows. IJCCRL Tools exists to reduce friction in computer-chess work. The goal is simple: cleaner PGN material, more repeatable rating workflows, audit-friendly outputs and utilities that help users spend less time fighting software and more time analysing reliable chess data. Some IJCCRL resources are public. Others are distributed through the membership layer because they require maintenance, packaging, testing infrastructure, release notes and stable long-term support. Access Member Tools with Lifetime View Membership Levels PGN workflows Rating utilities Audit-friendly outputs Portable releases Member-only downloads Lifetime support layer Why IJCCRL creates tools…  - [PGN Tools Suite (Split + ORDO + BayesElo)](https://ijccrl.com/pgn-tools-suite-split-ordo-bayeselo/): IJCCRL PGN Tools v1.1 — Lifetime Members Release Portable Windows toolkit to clean and audit PGN databases: split by result and move range, compute ratings with ORDO and BayesElo, and generate a daily Playchess report (W/D/L, opponents, ECO, decisive games). VIP • Lifetime Only Download access (Lifetime Members) This release is available inside our members-only area. Please log into your IJCCRL account and open the “Lifetime Downloads” section to access the package. Package name: IJCCRL_PGN_Tools_v1.1_2026-03-07.zip Platform: Windows 10/11 (portable — no Python required to run the EXE) Author (IJCCRL wrapper/app): Jorge Ruiz Centelles ⬇️ Download (Lifetime Area) 📄 Licences Tip: keep…  - [Winners](https://ijccrl.com/winners/): IJCCRL • Winners • IJCCRL Arena Series Winners This page is the official winners registry of the IJCCRL Arena Series. It preserves a strict separation between the Derived Stockfish Track and the Original UCI Track. Champions are published only after the event or final is conclusively closed, audited and publication-valid. Official registry IJCCRL Arena Series Derived / Original split enforced Classical Original champion added Bullet Original champion added Derived Blitz champion added StockfishJRC champion validated Original Classical final winner: Stockfish 18 Current update loaded • 2026-07-14 What belongs here One row per closed tournament or closed final. Tournament name, date, winner,…  - [Rules and Audit](https://ijccrl.com/rules-and-audit/): IJCCRL • Rules & Audit • IJCCRL Arena Series Rules & Audit This page defines the public rules framework and the audit logic of the IJCCRL Arena Series. It preserves the split between the Derived Stockfish Track and the Original UCI Track while keeping one common publication grammar for clocks, legality, openings, tablebases, integrity checks, public release conditions, tournament-side UCI configuration policy and knockout tiebreak exceptions. IJCCRL Arena Series Common framework Two-track rules Author-guided UCI profiles Audit-first publication Tiebreak exception codified Pair ratio 0 protected Framework role This page defines the public, reproducible rules framework of the IJCCRL Arena Series. It…  - [Bullet 120+2 (Original UCI)](https://ijccrl.com/bullet-1202-orig/): IJCCRL • II Final Bullet • 60s+2s • 2026 II FINAL BULLET IJCCRL CUP 2026 — Final Completed The final has now been completed and audited under the fixed mirrored opening duel criterion. The match was played over 200 games with 100 mirrored opening sets, exact side balance, AVX2 execution, and a complete published PGN. The champion is now confirmed. Final audited PASS 200 games 100 opening sets Bullet 60s + 2s AVX2 Champion confirmed Audit PASS Champion Stockfish dev-20260218-a6d055d7 wins the final and becomes the champion Stockfish dev-20260218-a6d055d7 defeated Reckless 0.9.0 by 110.0–90.0 in the final of II FINAL BULLET…  - [Downloads](https://ijccrl.com/downloads/): IJCCRL Downloads — IJCCRL Arena Series IJCCRL • Downloads • IJCCRL Arena Series Downloads This page is the official download hub for IJCCRL Arena Series event packs. Final tournament archives and audited provisional PGN or rating-surface packs are kept clearly separated so users can download current material without confusing it with closed final output. Official distribution hubIJCCRL Arena SeriesYear / Month / TrackAudited provisional packs listed24-may Original UCI Bullet league pack published24-may Derived R16-M2 pack published24-may Derived R16-M1 pack publishedOriginal UCI Bullet SF-M2 pack publishedOriginal UCI Bullet SF-M1 pack publishedOriginal UCI Bullet final pairing recordedOriginal UCI Bullet QF-M4 pack publishedOriginal UCI…  - [Broadcast](https://ijccrl.com/broadcast/) - [Experience gui viewer](https://ijccrl.com/experience-gui-viewer/): Experience Viewer (C++ / Win32) A lightweight Windows GUI app (Win32 + Common Controls) to inspect chess engine “experience” files (.exp), open PGN databases, and talk to UCI engines for quick checks.Designed to compile cleanly with MinGW-w64 (GCC 13+ / 15+) or Clang/LLVM on Windows. No heavy GUI frameworks are required. Pure Win32 API + common controls. Features Build (Windows) Prerequisites Using MinGW-w64 (GCC) Using Clang (with MinGW runtime) Clean The resulting executable will be: build/ExperienceViewer.exe Usage Tip: For long engine outputs, toggle View → Follow Output to auto-scroll. Project Layout Notes on .exp formats Because .exp files vary between engines/tools, this viewer aims to be permissive: If you have a specific .exp format spec, you can extend src/exp.cpp → try_parse_text_like() or add…  - [Alexandria 8.1.0 ssse41 popcnt](https://ijccrl.com/alexandria-8-1-0-ssse41-popcnt/) - [ijccrl ctg book opening membership](https://ijccrl.com/ijccrl-ctg-book-opening-membership/): Elevate your chess preparation with the IJCCRL Silver Membership, granting you daily access to the latest versions of chess opening books in CTG format, ijccrl ctg book. Designed for serious players and enthusiasts alike, our meticulously crafted opening repertoires ensure optimal performance against both human opponents and engines like Stockfish. Chess analysis software Key Benefits: Who Is This For? Join Today & Dominate Your Games! By subscribing to the IJCCRL Silver Membership, you invest in consistent improvement—transforming your opening play into a powerful weapon. - [Akan bin Membership](https://ijccrl.com/akan-bin-membership/): Elevate Your Chess Engine with Akan bin Membership Unleash Aggressive PrecisionTired of predictable openings? Supercharge your chess  computer’s performance with the Akan bin Membership—featuring an exclusive Polyglot Opening Book meticulously crafted for aggressive, dynamic play. Expertly updated by hand—not algorithm—to exploit cutting-edge tactical lines, this resource transforms passive engines into relentless attackers. Chess analysis software Chess computer software Chess computer reviews Why Akan bin? For Chess Computer Experts Like YouWhether you’re developing engines, analysing positions, or competing in AI battles, Akan bin provides the weaponised theory your work demands. Dominate the digital board with openings engineered for initiative and chaos. —Engineer the Aggression. Master the Game.…  - [No Access](https://ijccrl.com/no-access/): [dlm_no_access] - [Chess Engine Downloads & Test Suites](https://ijccrl.com/downloads_1/) - [Your Profile](https://ijccrl.com/membership-account/your-profile/) - [Log In](https://ijccrl.com/login-2/) - [Membership Levels](https://ijccrl.com/membership-levels/): [pmpro_levels] - [Membership Orders](https://ijccrl.com/membership-account/membership-orders/): [pmpro_invoice] - [Membership Confirmation](https://ijccrl.com/membership-checkout/membership-confirmation/): [pmpro_confirmation] - [Membership Checkout](https://ijccrl.com/membership-checkout/) - [Membership Cancel](https://ijccrl.com/membership-account/membership-cancel/): [pmpro_cancel] - [Membership Billing](https://ijccrl.com/membership-account/membership-billing/): [pmpro_billing] - [Membership Account](https://ijccrl.com/membership-account/) - [Thank You](https://ijccrl.com/thank-you/): [swpm_thank_you_page_registration] - [Profile](https://ijccrl.com/membership-profile/): [swpm_profile_form] - [Memberships & Resources for Chess Engines](https://ijccrl.com/tienda/) - [Detalles del proyecto](https://ijccrl.com/detalles-del-proyecto/) - [Acerca de](https://ijccrl.com/acerca-de/) - [Ratings List](https://ijccrl.com/ratings-list/): 365 Follow Every Day 20+ Travels 3 Family Size $0 Follow For Free I write about my life and journey 1000+ hours of meditation training Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam non nisl in velit dignissim mollis a rhoncus dolor. Blitz Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam non nisl in velit dignissim mollis a rhoncus dolor. View → Bullet Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam non nisl in velit dignissim mollis a rhoncus dolor. View → Ultra Bullet Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam non nisl in velit dignissim…  - [About](https://ijccrl.com/about/): Jorge Ruiz Jorge Ruiz Centelles is a true connoisseur of both chess and anthropology, a combination that reflects his deep intellectual curiosity and passion for understanding both the art of strategic play and the intricacies of human culture. With over 25 years of experience in computer chess, Jorge has mastered the evolution of the game, blending traditional chess principles with cutting-edge technological advancements. His impressive career is highlighted by significant achievements, including being crowned the Champion of Spain in advanced chess in 2001. This prestigious title was earned on an innovative online platform created by the renowned Miguel Illescas, a testament…  - [IJCCRL - Links](https://ijccrl.com/ijccrl-links/): Links List chesscomputer friends Sedat Canbaz CCRL Stefan Pohl  CEGT AC Telegram Channel - [Política de devoluciones y reembolsos](https://ijccrl.com/reembolso_devoluciones/): This is a sample page. Overview Our refund and returns policy lasts 30 days. If 30 days have passed since your purchase, we can’t offer you a full refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Several types of goods are exempt from being returned. Perishable goods such as food, flowers, newspapers or magazines cannot be returned. We also do not accept products that are intimate or sanitary goods, hazardous materials, or flammable liquids or gases. Additional non-returnable…  - [Archive | IJCCRL Past Tournaments and Results](https://ijccrl.com/archive/): IJCCRL • Archive • Closed Events Archive The IJCCRL Archive is the canonical historical index for closed events. It preserves event identity, track separation, time control, winner status, download routing and rating-list context without duplicating the full Downloads inventory or the full Elo tables. Canonical archive hub Closed-event index Original UCI Track Derived Stockfish Track PGN statistics separated Open Downloads Open Rating Lists Open PGN Games History Archive role No duplication rule What belongs here Closed IJCCRL events belong in the Archive once their competitive identity is stable enough to be preserved historically. Each entry should identify the event, track, time…  - [Download 3-4-5 pieces Syzygy](https://ijccrl.com/download-3-4-5-pieces-syzygy/): Download 3-4-5 pieces Syzygy Syzygy Endgame Tablebases (ETBs) represent a monumental achievement in computer chess, enabling perfect play in endgames with a limited number of pieces remaining on the board. Developed primarily by Ronald de Man, these tablebases provide a precomputed, exhaustive solution for every possible position within specific piece configurations. Unlike chess engines that rely on heuristic evaluation and deep searching, Syzygy bases offer definitive knowledge: they categorically state whether a position is a win, loss, or draw for the player to move, and precisely how many moves it takes to achieve that result (the Distance to Zero, or DTZ). The core principle involves brute-force calculation.…  - [I bin book IJCCRL tournament 2025](https://ijccrl.com/i-bin-book-ijccrl-tournament-2025/): Download games _18052025 - [1º Final season bullet IJCCRL 2025](https://ijccrl.com/1o-final-season-bullet-ijccrl-2025/) - [Bullet 60+1](https://ijccrl.com/bullet-601/): Bullet 60+1 Download games. - [Personalizar Cookies](https://ijccrl.com/personalizar-cookies/) - [Política de Cookies](https://ijccrl.com/politica-de-cookies/) - [Política de Privacidad](https://ijccrl.com/politica-de-privacidad/) - [Aviso Legal](https://ijccrl.com/aviso-legal/) - [Register](https://ijccrl.com/register/): [appointment_register_form] - [Bullet Rating List — IJCCRL Arena Series — Original UCI Track](https://ijccrl.com/bullet-rating-list-orig/): IJCCRL • Bullet Rating List • Original UCI Track Bullet Rating List — Official 1,350-Game Closure + Audited Knockout Results + Final Champion The audited 810-game regular season remains combined with the previous official 540-game Bullet rating surface, giving an official cumulative rating corpus of 1,350 regular-season games, 675 closed mirrored units and exactly 270 games per engine with 135 White / 135 Black games each. The rating scale remains IJCCRL Ordo base 3700, and knockout games remain bracket evidence rather than rating inputs. All four Q8 matches remain closed. In Q4_M2, the raw 400-game Obsidian–Reckless package contained one D1 movetext…  - [Blitz Rating List — IJCCRL Arena Series — Original UCI Track](https://ijccrl.com/blitz-rating-list-orig/): IJCCRL • Blitz Rating List • Original UCI Track Blitz 5+2 — Original UCI Track • Grand Final Audit Closed • Stockfish 18 Champion The current IJCCRL Arena Series 2026 — Original UCI Track — Blitz 5m+2s cycle is now closed. The Regular Season remains forensically validated on 520 accepted games and the knockout phase has concluded with the Grand Final between Stockfish 18 and Obsidian dev-16.15. The raw final package closed at 600 games with exact 300 White / 300 Black games per engine. Five proxy_fatal records caused by readyok timeout (12000ms) contaminated four mirrored opening units; under IJCCRL Rules+…  - [Classical Rating List — IJCCRL Arena Series — Original UCI Track](https://ijccrl.com/classical-rating-list-orig/): IJCCRL • Classical Rating List • Original UCI Track Classical Rating List — Original UCI Track — Accumulated Official Update This page is the updated official Classical rating surface of the IJCCRL Arena Series for the Original UCI Track. The previous official 180-game league surface is preserved as the reference list, and the newly audited 270-game regular season has now been added to it. The accumulated rating corpus is therefore 450 regular-season games: 90 games per engine, with exact 45 White / 45 Black balance per engine. The rating scale remains Elo base 3500. IJCCRL Arena Series Original UCI Track Classical…  - [Bullet Rating List — IJCCRL Arena Series — Derived Stockfish Track](https://ijccrl.com/bullet-rating-list/): IJCCRL • Bullet Rating List • Derived Stockfish Track Bullet Rating List — Official 1026-Game Regular Season — 22/05/2026 This page is the official Bullet rating surface for the II BLITZ IJCCRL LIVE ARENA 2026 — Derived Stockfish Track regular season. The audited dataset is closed at 1026 official games after removing one duplicated Dark SisTer vs Deepalienist game that had no mirrored partner and broke the pair-ratio contract. Ratings are centred on Elo base 3700. The first 16 engines in this table qualify for the next knockout phase, and the Round of 16 pairings below are updated to the current…  - [Advanced Chess](https://ijccrl.com/the-right-pediatrician/): Ut enim ad minim veniam, qused do eiusmod Lorem ipsum dolor sit amet conse ctetur adipisicing elit, sed do eiusmod tempor - [Blitz Rating List — IJCCRL Arena Series — Derived Stockfish Track](https://ijccrl.com/blitz-rating-list/): IJCCRL • Blitz Rating List • Derived Stockfish Track Blitz Rating List — Official 1026-Game Regular Season + Completed R16 Knockout + Completed R8 Knockout + Completed Semifinals + Final Result — StockfishJRC Champion — 11/06/2026 This page is the official Blitz rating surface for the II BLITZ IJCCRL LIVE ARENA 2026 — Derived Stockfish Track regular season. The audited dataset is closed at 1026 official games after removing one duplicated Dark SisTer vs Deepalienist game that had no mirrored partner and broke the pair-ratio contract. Ratings are centred on Elo base 3700. The first 16 engines in this table qualified…  - [Mi cuenta](https://ijccrl.com/mi-cuenta/) - [Finalizar compra](https://ijccrl.com/finalizar-compra/) - [Carrito](https://ijccrl.com/carrito/) - [Contact](https://ijccrl.com/582c1-blogger-gb-contact/) - [Chess engines ratings lists](https://ijccrl.com/) - [News](https://ijccrl.com/news582c1-blogger-gb-news/): This is an example page. It’s different from a blog post because it will stay in one place and will show up in your site navigation (in most themes). Most people start with an About page that introduces them to potential site visitors. It might say something like this: Hi there! I’m a bike messenger by day, aspiring actor by night, and this is my website. I live in Los Angeles, have a great dog named Jack, and I like piña coladas. 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With over 25 years of experience in computer chess, Jorge has mastered the evolution of the game, blending traditional chess principles with cutting-edge technological advancements. ## Optional - [Agent (MCP protocol)](websites-agents.hostinger.com/ijccrl.com/mcp) [comment]: # (Generated by Hostinger Tools Plugin)