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.
What belongs here
- One row per closed tournament or closed final.
- Tournament name, date, winner, author, track, stage and time control.
- Only final publication objects. No provisional champions.
- Links to Downloads, Rules & Audit and Archive surfaces.
Operational rule
- Derived lane: winners from the Derived Stockfish Track.
- Original lane: winners from the Original UCI Track.
- No mixing: derived champions and original UCI champions are not merged into one competitive table.
- Author field: fill it whenever the attribution is known.
- Date field: use the public closure/publication date of the event.
Derived Stockfish Track
This lane preserves champions from the derived-engine branch. It is a separate competitive and editorial surface, with its own event history, downloads and audit trail.
Original UCI Track
This lane preserves champions from the original-engine branch. It remains intentionally separated from the derived branch so that winners, ratings and historical records are not conflated.
Current Original UCI Classical Final Winner
Publication attribution added without altering the existing Derived Stockfish Track and Original UCI Track winner lists below.
| Tournament | Date | Winning engine | Engine author | Time control | Status | Links |
|---|---|---|---|---|---|---|
II Classical IJCCRL Live Arena Elite Chess Engines Cup 2026 — Original UCI Track — Final HP Mirror • fixed mirrored openings • pair ratio 0 • Classical final registry entry | 2026-05-13 | Stockfish 18 Final score: 13.0–11.0 vs Obsidian dev-16.15 | Original Stockfish project attribution for the Stockfish 18 champion entry. | 40m+2 | FINAL PASS |
Derived Stockfish Track Winners
Champions from the IJCCRL Arena Series derived branch are listed here once the event is closed and publication-valid.
| Tournament | Date | Winning engine | Engine author | Time control | Status | Links |
|---|---|---|---|---|---|---|
II Blitz IJCCRL Live Arena 2026 — Derived Stockfish Track — Final Fixed mirrored openings • pair ratio 0 • 100 games total • 50 mirrored units Forensic note: games 83–84 were symmetric readyok-timeout proxy results and did not affect the champion. | 2026-06-11 | StockfishJRC-2.20-070626-sse41popcnt Final score: 52.0–48.0 vs DarkSeid v10.7 SE | StockfishJRC adaptation by Jorge Ruiz; upstream Stockfish development team acknowledged. | 5m+2 | FINAL PASS | |
II Bullet IJCCRL Arena Series 2026 — Derived Stockfish Track — Final Fixed mirrored opening duel • pair ratio 0 • 200 games total | 2026-05-11 | Killfish PB 010426 Final score: 107.0–93.0 vs DarkSeid v10.7 SE | México | 60s+2 | FINAL | |
II Classical IJCCRL Arena Series 2026 — Derived Stockfish Track — Final Fixed mirrored opening duel • pair ratio 0 • 60 games total | 2026-04-21 | Killfish PB 260126 Final score: 30.5–29.5 vs Brainlearnjrc-1.90-110326-sse41popcnt | México | 40m+2 | FINAL |
Original UCI Track Winners
Champions from the IJCCRL Arena Series original branch are listed here separately from derived-engine champions.
| Tournament | Date | Winning engine | Engine author | Time control | Status | Links |
|---|---|---|---|---|---|---|
II Bullet IJCCRL Live Arena 2026 — Original UCI Track — Final Fixed mirrored openings • pair ratio 0 • 200 games total • 100 mirrored units | 2026-06-03 | Stockfish 18 Final score: 127.5–72.5 vs Obsidian dev-16.15 | mcostalba | 60s+2 | FINAL PASS | |
II Classical IJCCRL Live Arena Elite Chess Engines Cup 2026 — Original UCI Track — Final HP Mirror • fixed mirrored openings • pair ratio 0 • 24 games total • 12 mirrored units | 2026-05-13 | Stockfish 18 Stockfish dev-20260218-a6d055d7 • final score: 13.0–11.0 vs Obsidian dev-16.15 | Original Stockfish project attribution for Stockfish 18. | 40m+2 | FINAL PASS |