Dev Builds » 20210620-2117

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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 70ac5ecbb62b68382073b2367644945c1327ddfc
Author Stéphane Nicolet
Date 2021-06-20 21:17:07 UTC
Keep more pawns and pieces when attacking This patch increase the weight of pawns and pieces from 28 to 32 in the scaling formula we apply to the output of the NNUE pure eval. Increasing this gradient for pawns and pieces means that Stockfish will try a little harder to keep material when she has the advantage, and try a little bit harder to escape into an endgame when she is under pressure. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 53168 W: 4371 L: 4177 D: 44620 Ptnml(0-2): 160, 3389, 19283, 3601, 151 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 10888 W: 386 L: 288 D: 10214 Ptnml(0-2): 3, 260, 4821, 356, 4 closes Bench: 4965430
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