Dev Builds » 20200514-1834

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

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

Commit ID cca643669db016f20c6e91f50892a0b44f297a48
Author Stéphane Nicolet
Date 2020-05-14 18:34:15 UTC
Move 50 moves counter to initiative. simplify the usage of the 50 moves counter, moving it frome the scale factor to initiative. This patch was inspired by recent games where a blocked or semi-blocked position was 'blundered', by moving a pawn, into a lost endgame. This patch improves this situation, finding a more robust move more often. for example (1s searches with many threads): ``` FEN 8/p3kp2/Pp2p3/1n2PpP1/5P2/1Kp5/8/R7 b - - 68 143 master: 6 bestmove b5c7 6 bestmove e7e8 12 bestmove e7d8 176 bestmove e7d7 patch: 3 bestmove b5c7 5 bestmove e7d8 192 bestmove e7d7 ``` fixes https://github.com/official-stockfish/Stockfish/issues/2620 the patch also tests well passed STC LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 50168 W: 9508 L: 9392 D: 31268 Ptnml(0-2): 818, 5873, 11616, 5929, 848 https://tests.stockfishchess.org/tests/view/5ebb07287dd5693aad4e680b passed LTC LLR: 2.93 (-2.94,2.94) {-1.50,0.50} Total: 7520 W: 981 L: 870 D: 5669 Ptnml(0-2): 49, 647, 2256, 760, 48 https://tests.stockfishchess.org/tests/view/5ebbff747dd5693aad4e6858 closes https://github.com/official-stockfish/Stockfish/pull/2666 Bench: 4395562
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