Dev Builds » 20170802-0137

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 b24bd762b2aff6cac30e1ae673775ea6f6aa8d11
Author Rocky640
Date 2017-08-02 01:37:54 UTC
Rework the "unsupported" penalty into a "supported" bonus A pawn (according to all the searched positions of a bench run) is not supported 85% of the time, (in current master it is either isolated, backward or "unsupported"). So it made sense to try moving the S(17, 8) "unsupported" penalty value into the base pawn value hoping for a more representative pawn value, and accordingly a) adjust backward and isolated so that they stay more or less the same as master b) increase the mg connected bonus in the supported case by S(17, 0) and let the Connected formula find a suitable eg value according to rank. Tested as a simplification SPRT(-3, 1) Passed STC LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 19613 W: 3663 L: 3540 D: 12410 Passed LTC LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 24721 W: 3306 L: 3191 D: 18224 Bench: 5581946 Closes #1179
Copyright 2011–2024 Next Chess Move LLC