Summary
- I recorded canonical metadata for NNUE files (resolved path and timestamp) and purged them when the network is invalidated to maintain cache consistency.
- I normalized the loading of NNUE networks from disk to reuse weights when the file has not changed and to document the origin of embedded networks.
- I added a summary of reusable material in the evaluation to help decide which NNUE network to use without repeating piece counts or imbalances.
- Updated the engine name constant and build defaults so binaries and UCI metadata now report
Wordfish-2.80-061025. - Refreshed documentation and helper scripts to reference the new engine identifier for packaging, tuning, perft, and match automation workflows.
- Checked the latest upstream Stockfish patch (
ee243f0f, “Remove x86-64-vnni256 target”) and confirmed it has not been integrated yet because the local build system still exposes thex86-64-vnni256target
Go Depth 1
uci
id name Wordfish-2.80-061025
id author Jorge Ruiz Centelles and the Stockfish developers (see AUTHORS file)
option name Debug Log File type string default <empty>
option name NumaPolicy type string default auto
option name Threads type spin default 1 min 1 max 1024
option name Hash type spin default 16 min 1 max 33554432
option name Clear Hash type button
option name Ponder type check default false
option name MultiPV type spin default 1 min 1 max 256
option name Skill Level type spin default 20 min 0 max 20
option name Move Overhead type spin default 10 min 0 max 5000
option name Slow Mover type spin default 100 min 10 max 1000
option name nodestime type spin default 0 min 0 max 10000
option name Minimum Thinking Time type spin default 20 min 0 max 5000
option name UCI_Chess960 type check default false
option name UCI_LimitStrength type check default false
option name UCI_Elo type spin default 1320 min 1320 max 3190
option name UCI_ShowWDL type check default false
option name SyzygyPath type string default <empty>
option name SyzygyPremap type check default false
option name SyzygyProbeDepth type spin default 1 min 1 max 100
option name Syzygy50MoveRule type check default true
option name SyzygyProbeLimit type spin default 7 min 0 max 7
option name Book1 type check default false
option name Book1 File type string default <empty>
option name Book1 BestBookMove type check default false
option name Book1 Depth type spin default 255 min 1 max 350
option name Book1 Width type spin default 1 min 1 max 10
option name Book2 type check default false
option name Book2 File type string default <empty>
option name Book2 BestBookMove type check default false
option name Book2 Depth type spin default 255 min 1 max 350
option name Book2 Width type spin default 1 min 1 max 10
option name Experience Enabled type check default true
option name Experience File type string default experience.exp
option name Experience Readonly type check default false
option name Experience Prior type check default true
option name Experience Width type spin default 1 min 1 max 20
option name Experience Eval Weight type spin default 5 min 0 max 10
option name Experience Min Depth type spin default 27 min 4 max 64
option name Experience Max Moves type spin default 16 min 1 max 100
option name Experience Book type check default false
option name Experience Book Max Moves type spin default 100 min 1 max 100
option name Experience Book Min Depth type spin default 4 min 1 max 255
option name Experience Concurrent type check default false
option name MCTS by Shashin type check default false
option name MCTSThreads type spin default 0 min 0 max 512
option name MCTS Multi Strategy type spin default 20 min 0 max 100
option name MCTS Multi MinVisits type spin default 5 min 0 max 1000
option name MCTS Explore type check default false
option name Adaptive Style type check default false
option name EvalFile type string default nn-1c0000000000.nnue
option name EvalFileSmall type string default nn-baff1ede1f90.nnue
option name FalconFile type string default nn-c01dc0ffeede.nnue
uciok
info string experience.exp -> Total moves: 0. Total positions: 0. Duplicate moves: 0. Fragmentation: 0.00%)
go depth 1
info string Available processors: 0-23:24-47
info string Using 1 thread
info string NNUE evaluation using nn-1c0000000000.nnue (133MiB, (22528, 3072, 15, 32, 1))
info string source: <internal>
info string loaded: 2025-10-05 23:12:47Z
info string NNUE evaluation using nn-baff1ede1f90.nnue (6MiB, (22528, 128, 15, 32, 1))
info string source: <internal>
info string loaded: 2025-10-05 23:12:47Z
info string NNUE evaluation using nn-c01dc0ffeede.nnue (6MiB, (22528, 128, 15, 32, 1))
info string source: C:\tools\msys64\home\Administrador\Wordfish-2.80-061025\Builds\nn-c01dc0ffeede.nnue
info string loaded: 2025-10-05 23:12:47Z
info string Falcon NNUE status: active, requested='nn-c01dc0ffeede.nnue', source='C:\tools\msys64\home\Administrador\Wordfish-2.80-061025\Builds\nn-c01dc0ffeede.nnue', loaded=2025-10-05 23:12:47Z, fallback='nn-baff1ede1f90.nnue'
bestmove a2a3
Bench
Total time (ms) : 11337
Nodes searched : 3244628
Nodes/second : 286198
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