Dev Builds » 20250525-1855

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NCM plays each Stockfish dev build 20,000 times against Stockfish 14. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN

Commit

Commit ID f58d923fe0e8cb4545237c00ffebd264fe7fecaf
Author pb00067
Date 2025-05-25 18:55:49 UTC
Simplify & improve stalemate detection Change is functional because now we verify for stalemate also on captures and when not giving check. Green STC test on stalemate-book https://tests.stockfishchess.org/tests/view/682d878f6ec7634154f9ad2f Elo: 2.29 ± 1.3 (95%) LOS: 100.0% Total: 10000 W: 4637 L: 4571 D: 792 Ptnml(0-2): 2, 132, 4664, 202, 0 nElo: 12.42 ± 6.8 (95%) PairsRatio: 1.51 Green LTC test on stalemate-book https://tests.stockfishchess.org/tests/view/682daa2d6ec7634154f9ad67 Elo: 0.80 ± 0.8 (95%) LOS: 96.9% Total: 10000 W: 4727 L: 4704 D: 569 Ptnml(0-2): 0, 64, 4849, 87, 0 nElo: 6.51 ± 6.8 (95%) PairsRatio: 1.36 Passed non-regression test @ LTC https://tests.stockfishchess.org/tests/view/682dd10d6ec7634154f9adb3 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 148512 W: 38135 L: 38046 D: 72331 Ptnml(0-2): 55, 15759, 42558, 15810, 74 N.B.: The unique concern I have, is that due changes in future a negative SEE capture see might be returned in GOOD_CAPTURE stage. In this case the assert in can_move_king_or_pawn() will trigger since we must guarantee that all moves (also quiets) are generated in movepicker when calling can_move_king_or_pawn(). closes https://github.com/official-stockfish/Stockfish/pull/6088 bench: 2178135
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