Dev Builds » 20200413-0650

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 d7a2d5a44588676abf9b49e35a5a567fd57ec3b0
Author Lolligerhans
Date 2020-04-13 06:50:25 UTC
Remove candidate passers w/o feasible lever +-------+ | o . . | o their pawns | x . . | x our pawns | . x . | <- Can sacrifice to create passer? +-------+ yes 1 2 3 4 5 +-------+ +-------+ +-------+ +-------+ +-------+ | o . . | | o r . | | o r . | | o . b | | o . b | lowercase: theirs | x b . | | x . . | | x . R | | x . R | | x . . | uppercase: ours | . x . | | . x . | | . x . | | . x . | | . x B | +-------+ +-------+ +-------+ +-------+ +-------+ no no yes no yes The value of our top pawn depends on our ability to advance our bottom pawn, levering their blocker. Previously, this pawn configuration was always scored as passer (although a blocked one). Add requirements for the square s above our (possibly) sacrificed pawn: - s must not be occupied by them (1). - If they attack s (2), we must attack s (3). - If they attack s with a minor (4), we must attack s with a minor (5). The attack from their blocker is ignored because it is inherent in the structure; we are ok with sacrificing our bottom pawn. LTC LLR: 2.95 (-2.94,2.94) {0.25,1.75} Total: 37030 W: 4962 L: 4682 D: 27386 Ptnml(0-2): 266, 3445, 10863, 3625, 316 https://tests.stockfishchess.org/tests/view/5e92a2b4be6ede5b954bf239 STC LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 40874 W: 8066 L: 7813 D: 24995 Ptnml(0-2): 706, 4753, 9324, 4890, 764 https://tests.stockfishchess.org/tests/view/5e922199af0a0143109dc90e closes https://github.com/official-stockfish/Stockfish/pull/2624 Bench: 4828294
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