Dev Builds » 20201108-0815

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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 392b529c3f52103ad47ad096b86103c17758cb4f
Author Stéphane Nicolet
Date 2020-11-08 08:15:34 UTC
Qsearch pruning: follow-up This is a follow-up of the recent qsearch pruning patch in We now use the same guard condition (testing that we already have a defense with a score better score than a TB loss) for all pruning heuristics in qsearch(). This allows some pruning when in check, but in a controlled way to ensure that no wrong mate scores appear. Tested with Elo-gaining bounds: STC: LLR: 2.97 (-2.94,2.94) {-0.25,1.25} Total: 22632 W: 2433 L: 2264 D: 17935 Ptnml(0-2): 98, 1744, 7487, 1865, 122 LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 105432 W: 4965 L: 4648 D: 95819 Ptnml(0-2): 85, 4110, 44011, 4423, 87 closes Bench: 3578092
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