Dev Builds » 20181014-1802

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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 489357d7b221179a0fc116df706df5e937f991fa
Author 31m059
Date 2018-10-14 18:02:31 UTC
Combo This PR is a combination of two unrelated [0, 4] patches that appeared promising but not quite strong enough to pass on their own. The combination initially failed STC with a positive score after a long run, and the subsequent speculative LTC test passed. * tweak_threatOnQueen4 : Increase the middlegame components of ThreatByMinor[QUEEN] and ThreatByRook[QUEEN] by 15 each. Bryan's (@crossbr) analysis of CCC Bonus Game 10 inspired several tests on penalizing a queen with limited safe mobility. While attempting to implement this idea, I noticed that when I did not include the queen's current square in the calculations, the Elo gains seemed to vanish--and only then did I have the idea to revisit ThreatByMinor[QUEEN] and ThreatByRook[QUEEN], adding a corresponding value to each. Without Bryan's work, this test would never have been submitted. I would also like to recognize the efforts and contributions of @SFisGOD, who also vigorously worked on this idea. * Use pure static eval for null move pruning : This idea was directly re-purposed from a promising test by Jerry Donald Watson (@jerrydonaldwatson) in August. It was also independently developed and tested by Stefan Geschwentner (@locutus2) previously. Thank you all! STC (failed yellow): LLR: -2.96 (-2.94,2.94) [0.00,4.00] Total: 83913 W: 17986 L: 17825 D: 48102 LTC: LLR: 2.95 (-2.94,2.94) [0.00,4.00] Total: 137198 W: 22351 L: 21772 D: 93075 Bench: 4312846
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