Dev Builds » 20180224-1212

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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 5d57bb467a4d703f480c87f58687705e2f56e338
Author DU-jdto
Date 2018-02-24 12:12:04 UTC
Simplification: do razoring only for depth 1 The razoring heuristic is quite a drastic pruning technique, using a depth 0 search at internal nodes of the search tree to estimate the true value of depth n nodes. This patch limits this razoring to the case of internal nodes of depth 1. Author: Jarrod Torriero (DU-jdto) STC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 8043 W: 1865 L: 1716 D: 4462 LTC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 32890 W: 5577 L: 5476 D: 21837 Opportunities opened by this patch: it would be interesting to know if it brings Elo to re-introduce razoring or soft razoring at depth >= 2, maybe using a larger margin to compensate for the increased pruning effect. Bench: 5227124
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