Dev Builds » 20180313-2221

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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.


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 ID c5f6bd517c68e16c3ead7892e1d83a6b1bb89b69
Author Jerry Donald Watson
Date 2018-03-13 22:21:46 UTC
Tweak probcut margin with 'improving' flag Adjust ProbCut rBeta by whether the score is improving, and also set improving to false when in check. More precisely, this patch has two parts: 1) the increased beta threshold for ProbCut is now adjusted based on whether the score is improving 2) when in check, improving is always set to false. Co-authored by Joost VandeVondele (@vondele) and Bill Henry (@VoyagerOne). STC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 13480 W: 2840 L: 2648 D: 7992 LTC: LLR: 2.97 (-2.94,2.94) [0.00,5.00] Total: 25895 W: 4099 L: 3880 D: 17916 In terms of opportunities for future work opened up by this patch, the ProbCut rBeta formula could probably be tuned to gain more Elo. Closes Bench: 5328254
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