Dev Builds » 20191201-1812

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 f0047ce08e655e61ca07508cb9793405f75286f9
Author Alain SAVARD
Date 2019-12-01 18:12:39 UTC
King proximity tweak for passed pawns Decrease slightly the penalty for opponent king distance to passed pawn. Instead of 5:2 ratio (or 20:8) we now have 19:8 STC LLR: 2.95 (-2.94,2.94) [-1.50,4.50] Total: 28638 W: 6297 L: 6104 D: 16237 LTC LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 59586 W: 9766 L: 9429 D: 40391 Where to go from here: Further tests will try a similar tweak on the friendly king proximity penalty, because recent experiments indicate that this penalty is quite sensitive, but I wanted to try first on the larger term. Closes bench: 5258928 --------------- Increasing the penalty ratio to 21:8 was neutral. Decreasing the penalty ratio a bit more to 9:4 seems less promising
Copyright 2011–2024 Next Chess Move LLC