| !! latest version !! 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: Linmiao Xu
Date: Tue Jul 23 19:34:27 2024 +0200 Timestamp: 1721756067 Update default main net to nn-31337bea577c.nnue Created by updating output weights (256) and biases (8) of the previous main net with values found with spsa around 101k / 120k games at 140+1.4. 264 spsa params: output weights and biases in nn-e8bac1c07a5a.nnue A: 6000, alpha: 0.602, gamma: 0.101 weights: [-127, 127], c_end = 6 biases: [-8192, 8192], c_end = 64 Among the 264 params, 189 weights and all 8 biases were changed. Changes in the weights: - mean: -0.111 +/- 3.57 - range: [-8, 8] Found with the same method as: https://github.com/official-stockfish/Stockfish/pull/5459 Due to the original name (nn-ea8c9128c325.nnue) being too similar to the previous main net (nn-e8bac1c07a5a.nnue) and creating confusion, it was renamed by making non-functional changes to the .nnue file the same way as past nets with: https://github.com/linrock/nnue-namer To verify that bench is the same and view the modified non-functional bytes: ``` echo -e "setoption name EvalFile value nn-ea8c9128c325.nnue\nbench" | ./stockfish echo -e "setoption name EvalFile value nn-31337bea577c.nnue\nbench" | ./stockfish cmp -l nn-ea8c9128c325.nnue nn-31337bea577c.nnue diff <(xxd nn-ea8c9128c325.nnue) <(xxd nn-31337bea577c.nnue) ``` Passed STC: https://tests.stockfishchess.org/tests/view/669564154ff211be9d4ec080 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 57280 W: 15139 L: 14789 D: 27352 Elo +2.12 Ptnml(0-2): 209, 6685, 14522, 6995, 229 Passed LTC: https://tests.stockfishchess.org/tests/view/669694204ff211be9d4ec1b4 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 63030 W: 16093 L: 15720 D: 31217 Elo +2.06 Ptnml(0-2): 47, 6766, 17516, 7139, 47 closes https://github.com/official-stockfish/Stockfish/pull/5509 bench 1371485 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: Michael Chaly
Date: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Introduce pre-qsearch ttmove extensions at pv nodes The idea is that we are about to dive into qsearch (next search depth is <= 0) but since we have the move in transposition table we should extend that move and evaluate it with more precise search - because branch seems important. Passed STC: https://tests.stockfishchess.org/tests/view/6699d2564ff211be9d4ec488 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 83104 W: 21789 L: 21401 D: 39914 Elo +1.62 Ptnml(0-2): 293, 9748, 21128, 10044, 339 Passed LTC: https://tests.stockfishchess.org/tests/view/669b3f1a4ff211be9d4ec602 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 136098 W: 34636 L: 34111 D: 67351 Elo +1.34 Ptnml(0-2): 105, 14882, 37550, 15407, 105 closes https://github.com/official-stockfish/Stockfish/pull/5512 bench 1526129 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: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Remove Killer Heuristic In Move Ordering Passed Non-regression STC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 80480 W: 20979 L: 20802 D: 38699 Elo +0.76 Ptnml(0-2): 279, 9610, 20337, 9683, 331 https://tests.stockfishchess.org/tests/view/669c12c14ff211be9d4ec69b Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 77988 W: 19788 L: 19624 D: 38576 Elo +0.73 Ptnml(0-2): 66, 8605, 21481, 8783, 59 https://tests.stockfishchess.org/tests/view/669d628a4ff211be9d4ec7a8 closes https://github.com/official-stockfish/Stockfish/pull/5511 bench 1367740 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: Linmiao Xu
Date: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Replace simple eval with psqt in re-eval condition As a result, re-eval depends only on smallnet outputs so an extra call to simple eval can be removed. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/669743054ff211be9d4ec232 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 214912 W: 55801 L: 55777 D: 103334 Elo +0.04 Ptnml(0-2): 746, 24597, 56760, 24593, 760 https://github.com/official-stockfish/Stockfish/pull/5501 Bench: 1440277 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Shahin M. Shahin
Date: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Fix TB guard even if beta is below TB range, once we return probcutBeta with beta + 390 we can return wrong TB value, and guard against ttData.value being `VALUE_NONE` closes https://github.com/official-stockfish/Stockfish/pull/5499 bench: 1440277 see source |
| 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: FauziAkram
Date: Tue Jul 23 19:23:57 2024 +0200 Timestamp: 1721755437 Adding LowestElo and HighestElo constants These values represent the lowest Elo rating in the skill level calculation, and the highest one, but it's not clear from the code where these values come from other than the comment. This should improve code readability and maintainability. It makes the purpose of the values clear and allows for easy modification if the Elo range for skill level calculation changes in the future. Moved the Skill struct definition from search.cpp to search.h header file to define the Search::Skill struct, making it accessible from other files. closes https://github.com/official-stockfish/Stockfish/pull/5508 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: Tue Jul 23 18:01:14 2024 +0200 Timestamp: 1721750474 Bonus Simplification This tune removes completely a recently added term. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 61376 W: 16046 L: 15693 D: 29637 Elo +2.00 Ptnml(0-2): 207, 7132, 15665, 7469, 215 https://tests.stockfishchess.org/tests/view/669512b94ff211be9d4ebffb Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 100662 W: 25474 L: 25020 D: 50168 Elo +1.57 Ptnml(0-2): 64, 11092, 27581, 11514, 80 https://tests.stockfishchess.org/tests/view/66955f194ff211be9d4ec06a Passed LTC#2: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 28056 W: 7128 L: 6909 D: 14019 Elo +2.71 Ptnml(0-2): 18, 3084, 7620, 3273, 33 https://tests.stockfishchess.org/tests/view/669a541a4ff211be9d4ec52b closes https://github.com/official-stockfish/Stockfish/pull/5502 bench: 1619438 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: Dubslow
Date: Tue Jul 23 17:56:52 2024 +0200 Timestamp: 1721750212 Remove QS_CHECKS movepick stage Passed STC: https://tests.stockfishchess.org/tests/view/669597cf4ff211be9d4ec147 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 199072 W: 52100 L: 52058 D: 94914 Elo +0.07 Ptnml(0-2): 829, 23679, 50406, 23865, 757 Passed LTC: https://tests.stockfishchess.org/tests/view/66988f5f4ff211be9d4ec33e LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 119778 W: 30420 L: 30299 D: 59059 Elo +0.35 Ptnml(0-2): 106, 13293, 32957, 13440, 93 closes https://github.com/official-stockfish/Stockfish/pull/5498 Bench 1499842 see source |
| 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: Joost VandeVondele
Date: Tue Jul 23 17:51:30 2024 +0200 Timestamp: 1721749890 Fix TB PV extension and MultiPV in the case of MultiPV, the first move of the Nth multiPV could actually turn a winning position in a losing one, so don't attempt to correct it. Instead, always perform the first move without correction. Fixes #5505 Closes https://github.com/official-stockfish/Stockfish/pull/5506 No functional change 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: Joost VandeVondele
Date: Tue Jul 23 17:49:07 2024 +0200 Timestamp: 1721749747 Enable syzygy in the matetrack action now checks correctness of PV lines with TB score. uses 3-4-5 man table bases, downloaded from lichess, which are cached with the appropriate action. closes https://github.com/official-stockfish/Stockfish/pull/5500 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: Michael Chaly
Date: Fri Jul 19 08:41:38 2024 +0200 Timestamp: 1721371298 Adjust bonus to move that caused a fail low This is an elo gainer and simultaneously a minor logical fix to bonuses that caused a fail low. It increases maximum of statscore based subtraction - but disallows negative bonuses. Passed STC: https://tests.stockfishchess.org/tests/view/66955e6f4ff211be9d4ec063 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 44640 W: 11805 L: 11472 D: 21363 Elo +2.59 Ptnml(0-2): 166, 5178, 11335, 5439, 202 Passed LTC: https://tests.stockfishchess.org/tests/view/66963fde4ff211be9d4ec190 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 72288 W: 18478 L: 18082 D: 35728 Elo +1.90 Ptnml(0-2): 50, 7919, 19825, 8285, 65 closes https://github.com/official-stockfish/Stockfish/pull/5494 Bench: 1477054 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: Linmiao Xu
Date: Fri Jul 19 08:40:23 2024 +0200 Timestamp: 1721371223 Avoid calculating nnue complexity twice Passed non-regression STC: https://tests.stockfishchess.org/tests/view/6697459d4ff211be9d4ec236 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 146848 W: 38289 L: 38189 D: 70370 Elo +0.24 Ptnml(0-2): 503, 16665, 39046, 16649, 561 closes https://github.com/official-stockfish/Stockfish/pull/5493 No functional change 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: Shahin M. Shahin
Date: Fri Jul 19 08:38:13 2024 +0200 Timestamp: 1721371093 Try nullmoves only on cutnodes since master only tries nullmoves on cutNodes already with 99.0224% of the cases running bench, We can try null moves at 100% of cutNodes and achieve such simplification, by making passing false already equivalent to passing !cutNode This is a more correct form of PR #5482 Passed non-regression STC: https://tests.stockfishchess.org/tests/view/66941c044ff211be9d4ebf5f LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 153216 W: 39856 L: 39764 D: 73596 Elo +0.21 Ptnml(0-2): 590, 18174, 38979, 18284, 581 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/6694e5cd4ff211be9d4ebfdf LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 67842 W: 17178 L: 17004 D: 33660 Elo +0.89 Ptnml(0-2): 52, 7437, 18759, 7631, 42 closes https://github.com/official-stockfish/Stockfish/pull/5490 bench: 1345400 Co-Authored-By: FauziAkram <11150271+> 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: Dubslow
Date: Fri Jul 19 08:36:25 2024 +0200 Timestamp: 1721370985 Linearize corrHist Passed STC: https://tests.stockfishchess.org/tests/view/66919cdec6827afcdcee146f LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 130656 W: 33579 L: 33461 D: 63616 Elo +0.31 Ptnml(0-2): 394, 15548, 33318, 15682, 386 Passed VVLTC: https://tests.stockfishchess.org/tests/view/6691acb2c6827afcdcee1645 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 160314 W: 40925 L: 40854 D: 78535 Elo +0.15 Ptnml(0-2): 12, 14754, 50551, 14831, 9 closes https://github.com/official-stockfish/Stockfish/pull/5489 bench 1380295 see source |
| 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: yl25946
Date: Fri Jul 19 08:34:02 2024 +0200 Timestamp: 1721370842 Replace ternary with std::min equivalent and more readable. closes https://github.com/official-stockfish/Stockfish/pull/5488 No functional change 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: Guenther Demetz
Date: Fri Jul 19 08:32:16 2024 +0200 Timestamp: 1721370736 Simplify improving condition if we were in check at our previous move we look back until we weren't in check and take the staticEval of that position as reference. Passed STC: https://tests.stockfishchess.org/tests/view/668ba7b65034141ae5996665 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 74784 W: 19454 L: 19274 D: 36056 Elo +0.84 Ptnml(0-2): 260, 8874, 18952, 9038, 268 Passted LTC: https://tests.stockfishchess.org/tests/view/668cb2db5034141ae599678b LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 241488 W: 61166 L: 61171 D: 119151 Elo -0.01 Ptnml(0-2): 190, 27154, 66062, 27147, 191 closes https://github.com/official-stockfish/Stockfish/pull/5492 bench: 1368313 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: Linmiao Xu
Date: Mon Jul 15 13:38:14 2024 +0200 Timestamp: 1721043494 Separate eval params for smallnet and main net Values found with spsa around 80% of 120k games at 60+0.6: https://tests.stockfishchess.org/tests/view/669205dac6827afcdcee3ea4 Passed STC: https://tests.stockfishchess.org/tests/view/6692928b4ff211be9d4e98a9 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 313696 W: 81107 L: 80382 D: 152207 Elo +0.80 Ptnml(0-2): 934, 36942, 80363, 37683, 926 Passed LTC: https://tests.stockfishchess.org/tests/view/6692aab54ff211be9d4e9915 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 228420 W: 57903 L: 57190 D: 113327 Elo +1.08 Ptnml(0-2): 131, 25003, 63243, 25688, 145 closes https://github.com/official-stockfish/Stockfish/pull/5486 bench 1319322 see source |
| Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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: Mon Jul 15 13:35:06 2024 +0200 Timestamp: 1721043306 Remove quiet history pruning depth limit This patch removes lmrDepth limit for quiet moves history based pruning. Previously removal of this type of depth limits was considered bad because it was performing bad for matetrack - but with this pruning heuristic this shouldn't be that bad because it's "naturally" depth limited by history threshold and should be completely disabled at depth >= 15 or so. Also this heuristic in previous years was known to scale non-linearly - bigger lmrDepth thresholds were better at longer time controls and removing it completely probably should scale pretty well. Passed STC: https://tests.stockfishchess.org/tests/view/6692b89b4ff211be9d4eab21 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 114464 W: 29675 L: 29545 D: 55244 Elo +0.39 Ptnml(0-2): 372, 12516, 31329, 12640, 375 Passed LTC: https://tests.stockfishchess.org/tests/view/6692c4554ff211be9d4eab3d LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 67746 W: 17182 L: 17014 D: 33550 Elo +0.86 Ptnml(0-2): 28, 6993, 19652, 7183, 17 closes https://github.com/official-stockfish/Stockfish/pull/5485 Bench: 1250388 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: MinetaS
Date: Mon Jul 15 13:30:47 2024 +0200 Timestamp: 1721043047 Use ValueList to represent searched moves array This PR replaces a pair of array and size with existing ValueList class. Removes two local variables in search and two parameters of update_all_stats. Passed non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 227040 W: 58472 L: 58463 D: 110105 Elo +0.01 Ptnml(0-2): 495, 23572, 65427, 23481, 545 https://tests.stockfishchess.org/tests/view/669299204ff211be9d4e98dc closes https://github.com/official-stockfish/Stockfish/pull/5484 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: FauziAkram
Date: Mon Jul 15 13:27:42 2024 +0200 Timestamp: 1721042862 bonus calculation for prior countermoves Introduce a new term to the bonus calculation for prior countermoves Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 140896 W: 36545 L: 36079 D: 68272 Elo +1.15 Ptnml(0-2): 383, 16505, 36217, 16949, 394 https://tests.stockfishchess.org/tests/view/6691c73cc6827afcdcee1816 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 126660 W: 32089 L: 31587 D: 62984 Elo +1.38 Ptnml(0-2): 63, 13774, 35154, 14276, 63 https://tests.stockfishchess.org/tests/view/6691cdc4c6827afcdcee1930 closes https://github.com/official-stockfish/Stockfish/pull/5483 bench: 1250388 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: Linmiao Xu
Date: Mon Jul 15 13:24:14 2024 +0200 Timestamp: 1721042654 Set best value to futility value after pruned quiet move Passed non-regression STC: https://tests.stockfishchess.org/tests/view/6691592f5034141ae599c68d LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 278496 W: 71818 L: 71865 D: 134813 Elo -0.06 Ptnml(0-2): 865, 33311, 70978, 33194, 900 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/66918fca5034141ae599e761 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 202986 W: 51048 L: 51013 D: 100925 Elo +0.06 Ptnml(0-2): 107, 22552, 56133, 22601, 100 closes https://github.com/official-stockfish/Stockfish/pull/5480 bench 1715206 see source |
| 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: Michael Chaly
Date: Mon Jul 15 13:22:31 2024 +0200 Timestamp: 1721042551 Decrease delta Decrease delta in aspiration windows - both initial value and quadratic function of previous best value. Passed STC: https://tests.stockfishchess.org/tests/view/6691a52ec6827afcdcee1569 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 55456 W: 14449 L: 14107 D: 26900 Elo +2.14 Ptnml(0-2): 174, 6416, 14193, 6784, 161 Passed LTC: https://tests.stockfishchess.org/tests/view/6691aac1c6827afcdcee1625 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 107940 W: 27530 L: 27065 D: 53345 Elo +1.50 Ptnml(0-2): 52, 11787, 29840, 12226, 65 closes https://github.com/official-stockfish/Stockfish/pull/5479 bench 1547707 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: MinetaS
Date: Mon Jul 15 13:19:46 2024 +0200 Timestamp: 1721042386 Simplify futility_move_count This patch reverts changes from #4032 which was introduced as a speedup. Modern compilers no longer use DIV/IDIV instructions, potentially making the explicit branch perform worse. Since evaluations spend significantly more time now, the impact of the speedup in search diminishes with old compilers as well. GCC 14.1.0 profile-build, x86-64-vnni512 ``` .text:000000014010FEA9 mov ecx, [rsp+3FB8h+var_3F5C] ... .text:000000014010FEBD mov r10d, ecx .text:000000014010FEC0 imul r10d, ecx .text:000000014010FEC4 mov ecx, dword ptr [rsp+3FB8h+var_3F44+4] .text:000000014010FEC8 add r10d, 3 .text:000000014010FECC mov r11d, r10d .text:000000014010FECF sar r11d, 1 .text:000000014010FED2 cmp [rsp+3FB8h+var_3EE7], 0 .text:000000014010FEDA cmovnz r11d, r10d ``` LLVM 18.1.18 profile-build, x86-64-vnni512 ``` .text:0000000140001EDC mov [rsp+40h+arg_E0], r13 .text:0000000140001EE4 movsxd rcx, r13d .text:0000000140001EE7 mov rax, rcx .text:0000000140001EEA mov [rsp+40h+arg_B8], rcx .text:0000000140001EF2 imul eax, eax .text:0000000140001EF5 add eax, 3 .text:0000000140001EF8 mov ecx, [rsp+40h+arg_8C] .text:0000000140001EFF shrx eax, eax, ecx .text:0000000140001F04 mov [rsp+40h+arg_190], rax ``` Passed non-regression STC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 109504 W: 28420 L: 28280 D: 52804 Elo +0.44 Ptnml(0-2): 355, 12326, 29273, 12420, 378 https://tests.stockfishchess.org/tests/view/6690dc095034141ae599c5fe closes https://github.com/official-stockfish/Stockfish/pull/5478 No functional change see source |
| 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: Shawn Xu
Date: Mon Jul 15 13:18:37 2024 +0200 Timestamp: 1721042317 Unify Movepick Initializer Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 168704 W: 43524 L: 43455 D: 81725 Elo +0.14 Ptnml(0-2): 414, 17173, 49076, 17308, 381 https://tests.stockfishchess.org/tests/view/66904b7b5034141ae599a197 Passed Non-regression LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 120294 W: 30473 L: 30364 D: 59457 Elo +0.31 Ptnml(0-2): 40, 10974, 38032, 11039, 62 https://tests.stockfishchess.org/tests/view/66905b235034141ae599a223 closes https://github.com/official-stockfish/Stockfish/pull/5477 bench 1459677 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: Mon Jul 15 13:15:35 2024 +0200 Timestamp: 1721042135 Simplify Away Refutation Stage Simplify away killer stage to a constant bonus given to the killer move during quiet move scoring. Passed Non-regression STC (Against then-pending PR #5472): LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 106176 W: 27685 L: 27539 D: 50952 Elo +0.48 Ptnml(0-2): 410, 12765, 26637, 12821, 455 https://tests.stockfishchess.org/tests/view/668dd0835034141ae5999e8f Passed Non-regression LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 92472 W: 23426 L: 23276 D: 45770 Elo +0.56 Ptnml(0-2): 55, 10376, 25215, 10544, 46 https://tests.stockfishchess.org/tests/view/669019e45034141ae5999fd2 closes https://github.com/official-stockfish/Stockfish/pull/5476 Bench 1459677 see source |