Dev Builds » 20180228-1242

Use this dev build

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 94abc2a0cfa262e2e040886394c782af226bc1bd
Author Tom Vijlbrief
Date 2018-02-28 12:42:32 UTC
Reintroduce depth 2 razoring (with additional margin) The first depth 2 margin triggers the verification quiescence search. This qsearch() result has to be better then the second lower margin, so we only skip the razoring when the qsearch gives a significant improvement. Passed STC: LLR: 2.95 (-2.94,2.94) [0.00,5.00] Total: 32133 W: 7395 L: 7101 D: 17637 Passed LTC: LLR: 2.96 (-2.94,2.94) [0.00,5.00] Total: 17382 W: 3002 L: 2809 D: 11571 This Elo-gaining version was further simplified following a suggestion of Marco Costalba: STC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 15553 W: 3505 L: 3371 D: 8677 LTC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 13253 W: 2270 L: 2137 D: 8846 How to continue after this patch? Reformating the razoring code (step 7 in search()) to unify the depth 1 and depth 2 treatements seems quite possible, this could possibly lead to more simplifications. Bench: 5765806
Copyright 2011–2024 Next Chess Move LLC