Dev Builds » 20180225-1212

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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 2e21aba8d937bdf5eb0eedeac99ac2c2553e9d0d
Author Stéphane Nicolet
Date 2018-02-25 12:12:23 UTC
Count passed pawns in asymmetry measure The previous asymmetry measure of the pawn structure only used to consider the number of pawns on semi-opened files in the postions. With this patch we also increase the measure by the number of passed pawns for both players. STC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 13146 W: 3038 L: 2840 D: 7268 LTC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 27776 W: 4771 L: 4536 D: 18469 How to continue from there: Stockfish will now evaluate more positions with passed pawns, so tuning the passed pawns values may bring Elo. The patch also has consequences on the initiative term. Bench: 5302866
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