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Author	SHA1	Message	Date
Daniel MonroeandDisservin	c76c179361	Remove non-functional std::min() ... closes https://github.com/official-stockfish/Stockfish/pull/5749 No functional change	2025-01-06 00:48:05 +01:00
Daniel MonroeandJoost VandeVondele	91ec31dac4	Grade countermove bonus for low statscores ... Passed STC: LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 338592 W: 88396 L: 87627 D: 162569 Ptnml(0-2): 1161, 40201, 85788, 41000, 1146 https://tests.stockfishchess.org/tests/view/6679d40c0c2db3fa2dcecbcc Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 83526 W: 21429 L: 21010 D: 41087 Ptnml(0-2): 54, 9173, 22913, 9546, 77 https://tests.stockfishchess.org/tests/view/667c5f2980450dba965911fc closes https://github.com/official-stockfish/Stockfish/pull/5418 bench: 1489815	2024-07-01 19:53:45 +02:00
Daniel MonroeandJoost VandeVondele	ef94f77f8c	Update default net to nn-a3d1bfca1672.nnue ... faster permutation of master net weights Activation data taken from https://drive.google.com/drive/folders/1Ec9YuuRx4N03GPnVPoQOW70eucOKngQe?usp=sharing Permutation found using https://github.com/Ergodice/nnue-pytorch/blob/836387a0e5e690431d404158c46648710f13904d/ftperm.py See also https://github.com/glinscott/nnue-pytorch/pull/254 The algorithm greedily selects 2- and 3-cycles that can be permuted to increase the number of runs of zeroes. The percent of zero runs from the master net increased from 68.46 to 70.11 from 2-cycles and only increased to 70.32 when considering 3-cycles. Interestingly, allowing both halves of L1 to intermix when creating zero runs can give another 0.5% zero-run density increase with this method. Measured speedup: ``` CPU: 16 x AMD Ryzen 9 3950X 16-Core Processor Result of 50 runs base (./stockfish.master ) = 1561556 +/- 5439 test (./stockfish.patch ) = 1575788 +/- 5427 diff = +14231 +/- 2636 speedup = +0.0091 P(speedup > 0) = 1.0000 ``` closes https://github.com/official-stockfish/Stockfish/pull/4640 No functional change	2023-07-01 12:59:28 +02:00