Dev Builds » 20180401-0121

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 e408fd7b10503a9114962cb5972abd9957bc67c2
Author Joost VandeVondele
Date 2018-04-01 01:21:45 UTC
Document Elo impact of various parts of search In order to understand better the impact of various techniques used in search, Elo estimates have been run at STC for 60000 games (statistical error ~1.8 Elo), disabling each feature in turn. This should help future improvements and simplifications to pick suitable targets. The list of tests is: step 7 : step 8 : step 9 : step 10 : step 11 : step 13 : step 13a: step 13b: step 14 : step 14a: step 14b: step 14c: step 14d: step 14e: This patch documents this in the code. Note that it will be a waste to recompute these estimates often, even a couple of [0,5] patches are unlikely to change them by more than the error bars. The interest of the Elo annotations in the code is not in the details, but in high- lighting trends such as razoring (2 Elo) and singular extensions (60 Elo). These estimates should be recomputed at most once a year. Closes No functional change.
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