Dev Builds » 20180904-0843

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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

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


Commit ID 4bef7aa5cd682617502cacfa4413c0d2c78401ca
Author ElbertoOne
Date 2018-09-04 08:43:02 UTC
Parameter tweaks in PSQT and NMP This patch is a combinaison of two parameters tweaks patches which have failed as strong yellows at LTC recently, by Alain Savard (Rocky640) and Fabian Fichter (ianfab): Passed STC: LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 57200 W: 12392 L: 12008 D: 32800 And LTC: LLR: 2.96 (-2.94,2.94) [0.00,4.00] Total: 37215 W: 6233 L: 5962 D: 25020 Closes Bench: 4136116 --------------- How to continue from there? The null move reduction formula in line 769 of search.cpp is quite convoluted and full of mysterious magic constants at the moment, it would certainly be nice to simplify it and/or gain more Elo from it: ``` Depth R = ( (823 + 67 * depth / ONE_PLY) / 256 + std::min(int(eval - beta) / 200, 3)) * ONE_PLY; ```
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