Dev Builds » 20250804-1316

You are viewing an old NCM Stockfish dev build test. You may find the most recent dev build tests using Stockfish 15 as the baseline here.

Use this dev build

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 94175524b1c06f1a4ce80a5640272a15120dcbbd
Author rn5f107s2
Date 2025-08-04 13:16:21 UTC
Only set ep square if ep capture is possible for positions such as: position fen rr6/2q2p1k/2P1b1pp/bB2P1n1/R2B2PN/p4P1P/P1Q4K/1R6 b - - 2 38 moves f7f5 position fen 8/p2r1pK1/6p1/1kp1P1P1/2p5/2P5/8/4R3 b - - 0 43 moves f7f5 position fen 4k3/4p3/2b3b1/3P1P2/4K3/8/8/8 b - - moves e7e5 ep is not possible for various reasons. Do not set the ep square and the do not change the zobrist key, as if ep were possible. This fixes 3-fold detection, which could in rare cases be observed as a warning generated by fastchess for PVs that continued beyond an actual 3-fold. Also fixes wrong evals for certain moves e.g. a2a1 for position fen 4k3/1b2p2b/8/3P1P2/4K3/8/8/r7 b - - 0 1 moves e7e5 e4e3 a1a2 e3e4 a2a1 e4f3 a1a2 f3e4 fixes https://github.com/official-stockfish/Stockfish/issues/6138 originally written and tested by rn5f107s2, with small buglet as https://tests.stockfishchess.org/tests/view/685af90843ce022d15794400 failed STC LLR: -2.93 (-2.94,2.94) <-1.75,0.25> Total: 130688 W: 33986 L: 34362 D: 62340 Ptnml(0-2): 414, 13292, 38302, 12928, 408 https://tests.stockfishchess.org/tests/view/688bcb35502b34dd5e7111c9 passed LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 99018 W: 25402 L: 25273 D: 48343 Ptnml(0-2): 54, 9097, 31089, 9204, 65 https://tests.stockfishchess.org/tests/view/688c613c502b34dd5e7112d3 https://github.com/official-stockfish/Stockfish/pull/6211 Bench: 2946135 Co-authored-by: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Copyright 2011–2025 Next Chess Move LLC