Latest abrok development 13 Nov including Update default main net to nn-1c0000000000.nnue

!! latest version !! Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Michael Chaly Date: Wed Nov 13 20:35:02 2024 +0100 Timestamp: 1731526502 Adjust statscore for captures Instead of using quiet histories use capture history with a different offset. Passed STC: https://tests.stockfishchess.org/tests/view/6731d5cc86d5ee47d953e719 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 428896 W: 111160 L: 110269 D: 207467 Elo +0.72 Ptnml(0-2): 1220, 50296, 110534, 51169, 1229 Passed LTC: https://tests.stockfishchess.org/tests/view/6733d9fd86d5ee47d953e962 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 105882 W: 26918 L: 26458 D: 52506 Elo +1.51 Ptnml(0-2): 66, 11430, 29482, 11904, 59 closes https://github.com/official-stockfish/Stockfish/pull/5679 Bench: 840721 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Disservin Date: Wed Nov 13 20:35:02 2024 +0100 Timestamp: 1731526502 Fix CI Docker Buildx closes https://github.com/official-stockfish/Stockfish/pull/5678 No functional change see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: FauziAkram Date: Wed Nov 13 20:35:02 2024 +0100 Timestamp: 1731526502 Simplify big-net reevaluation Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 37408 W: 9699 L: 9477 D: 18232 Elo +2.06 Ptnml(0-2): 130, 4326, 9577, 4534, 137 https://tests.stockfishchess.org/tests/view/672ffd8086d5ee47d953e633 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 151062 W: 38087 L: 37999 D: 74976 Elo +0.20 Ptnml(0-2): 63, 16686, 41958, 16748, 76 https://tests.stockfishchess.org/tests/view/673087aa86d5ee47d953e66b closes https://github.com/official-stockfish/Stockfish/pull/5674 Bench: 848812 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Linmiao Xu Date: Wed Nov 13 20:35:02 2024 +0100 Timestamp: 1731526502 Update default main net to nn-1c0000000000.nnue Found by updating 489 L2 weights with values found from around 31k / 60k spsa games. Spsa was configured to use 60k games, down from 120k games in: https://github.com/official-stockfish/Stockfish/pull/5459 623 spsa params: L2 weights from `nn-1cedc0ffeeee.nnue` where 24 <= \|value\| <= 30 A: 3000, alpha: 0.602, gamma: 0.101 weights: [-127, 127], c_end = 6 Passed STC: https://tests.stockfishchess.org/tests/view/6728d61e86d5ee47d953dcaf LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 187168 W: 48642 L: 48107 D: 90419 Elo +0.99 Ptnml(0-2): 558, 21888, 48213, 22311, 614 Passed LTC: https://tests.stockfishchess.org/tests/view/672b018f86d5ee47d953de98 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 235074 W: 59924 L: 59202 D: 115948 Elo +1.07 Ptnml(0-2): 131, 25467, 65610, 26207, 122 closes https://github.com/official-stockfish/Stockfish/pull/5673 Bench: 898850 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Nonlinear2 Date: Wed Nov 13 20:35:02 2024 +0100 Timestamp: 1731526502 Use cutnode as TT Cutoff Condition At low enough depths, fail high with TT only when expected cutnode. Passed STC: https://tests.stockfishchess.org/tests/view/6726357b86d5ee47d953da8c LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 41184 W: 10873 L: 10551 D: 19760 Elo +2.72 Ptnml(0-2): 131, 4728, 10554, 5046, 133 Passed LTC: https://tests.stockfishchess.org/tests/view/6727326a86d5ee47d953db30 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 270888 W: 69040 L: 68243 D: 133605 Elo +1.02 Ptnml(0-2): 180, 29385, 75485, 30246, 148 closes https://github.com/official-stockfish/Stockfish/pull/5670 Bench: 805776 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Muzhen Gaming Date: Wed Nov 13 20:34:53 2024 +0100 Timestamp: 1731526493 VVLTC Search Tune A single tuning run of 190k games was conducted: https://tests.stockfishchess.org/tests/view/670f3e3786d5ee47d953c554. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/672344dc86d5ee47d953d8c3 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 56768 W: 14615 L: 14323 D: 27830 Elo +1.79 Ptnml(0-2): 3, 5152, 17789, 5430, 10 Passed VVLTC 2nd sprt (rebased): https://tests.stockfishchess.org/tests/view/6726d83786d5ee47d953db03 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 57884 W: 14885 L: 14554 D: 28445 Elo +1.99 Ptnml(0-2): 5, 5300, 17999, 5635, 3 closes https://github.com/official-stockfish/Stockfish/pull/5669 Bench: 920336 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Shawn Xu Date: Wed Nov 13 20:12:47 2024 +0100 Timestamp: 1731525167 Introduce Fractional LMR Tuning Run (90k Games): https://tests.stockfishchess.org/tests/view/67202b1c86d5ee47d953d442 Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 241024 W: 62616 L: 62001 D: 116407 Elo +0.89 Ptnml(0-2): 716, 28231, 62015, 28822, 728 https://tests.stockfishchess.org/tests/view/6725196786d5ee47d953d9f2 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 92532 W: 23678 L: 23246 D: 45608 Elo +1.62 Ptnml(0-2): 45, 9981, 25797, 10383, 60 https://tests.stockfishchess.org/tests/view/6727d3cb86d5ee47d953db9d closes https://github.com/official-stockfish/Stockfish/pull/5667 Bench: 1066071 see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: mstembera Date: Wed Nov 13 20:11:03 2024 +0100 Timestamp: 1731525063 Remove stale Cache::clear() method closes https://github.com/official-stockfish/Stockfish/pull/5666 No functional change see source
Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: FauziAkram Date: Wed Nov 13 20:09:13 2024 +0100 Timestamp: 1731524953 Revert VLTC regression from #5634 https://tests.stockfishchess.org/tests/view/671bf61b86d5ee47d953cf23 And thanks to @xu-shawn for suggesting running a VLTC regress test since depth modifications affect scaling. Also, the LTC was showing a slight regress after 680+k games ~= -0.34 , for reference: https://tests.stockfishchess.org/tests/view/67042b1f86d5ee47d953be7c closes https://github.com/official-stockfish/Stockfish/pull/5663 Bench: 1307308 see source
Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: Michael Chaly Date: Wed Nov 13 20:08:14 2024 +0100 Timestamp: 1731524894 Refine definition of improving This patch also allows improving flag to be true if static evaluation of the position is good enough. Passed STC: https://tests.stockfishchess.org/tests/view/6720906086d5ee47d953d4d0 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 34816 W: 9172 L: 8858 D: 16786 Elo +3.13 Ptnml(0-2): 113, 3988, 8887, 4312, 108 Passed LTC: https://tests.stockfishchess.org/tests/view/6721162686d5ee47d953d597 LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 145374 W: 37118 L: 36574 D: 71682 Elo +1.30 Ptnml(0-2): 91, 15875, 40212, 16417, 92 closes https://github.com/official-stockfish/Stockfish/pull/5662 Bench: 1518856 see source

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