| 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: Sun Jan 12 21:18:39 2025 +0100 Timestamp: 1736713119 Simplify Probcut Condition Rebased and properly guarded #5720 Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 179616 W: 45764 L: 45706 D: 88146 Elo +0.11 Ptnml(0-2): 125, 19665, 50162, 19739, 117 https://tests.stockfishchess.org/tests/view/677590531a2f267f20548b82 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 445728 W: 113467 L: 113682 D: 218579 Elo -0.17 Ptnml(0-2): 331, 49226, 123900, 49141, 266 https://tests.stockfishchess.org/tests/view/67734f351a2f267f205489d9 closes https://github.com/official-stockfish/Stockfish/pull/5758 Bench: 1180421 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: Disservin
Date: Sun Jan 12 21:18:08 2025 +0100 Timestamp: 1736713088 Improve Instrumented Python Testing Script For betting debugging and earlier stop in case of termination, like in https://github.com/official-stockfish/Stockfish/pull/5754#issuecomment-2576120357 closes https://github.com/official-stockfish/Stockfish/pull/5755 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: Maxim Masiutin
Date: Sun Jan 12 21:16:32 2025 +0100 Timestamp: 1736712992 Add .gitattributes for script LE closes https://github.com/official-stockfish/Stockfish/pull/5753 No functional change 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: pb00067
Date: Sun Jan 12 21:15:35 2025 +0100 Timestamp: 1736712935 Simplify away hint for common parent position at probcut Since it's introduction at probcut step the nnue network has changed substantially and now it no longer seems useful. Passed non-regression test at STC https://tests.stockfishchess.org/tests/view/675fe27986d5ee47d9542d86 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 118656 W: 30732 L: 30609 D: 57315 Elo +0.36 Ptnml(0-2): 319, 12767, 33049, 12858, 335 N.B.: It may be useful to reintroduce it here at probcut if we know that a node that was cut away previously now has to be explored. Exploring new ground will deliver no tt-hits so in this case the hint for common parent position might be useful. 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: Shawn Xu
Date: Sun Jan 12 21:14:11 2025 +0100 Timestamp: 1736712851 Simplify Fail-Low Bonus Passed Non-regression STC: LLR: 2.92 (-2.94,2.94) <-1.75,0.25> Total: 66592 W: 17426 L: 17239 D: 31927 Elo +0.98 Ptnml(0-2): 208, 7812, 17109, 7919, 248 https://tests.stockfishchess.org/tests/view/6774e1711a2f267f20548b22 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 179616 W: 45764 L: 45706 D: 88146 Elo +0.11 Ptnml(0-2): 125, 19665, 50162, 19739, 117 https://tests.stockfishchess.org/tests/view/677590531a2f267f20548b82 closes https://github.com/official-stockfish/Stockfish/pull/5751 Bench: 1310158 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: Shawn Xu
Date: Sun Jan 12 21:13:14 2025 +0100 Timestamp: 1736712794 Refactor Stats Array * Limit use of `StatsEntry` wrapper to arithmetic types * Generalize `Stats` to `MultiArray` by discarding the template parameter `D` * Allow `MultiArray::fill` to take any type assignable to element type * Remove now-unused operator overloads on `StatsEntry` closes https://github.com/official-stockfish/Stockfish/pull/5750 No functional change 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: Shawn Xu
Date: Sun Jan 12 21:11:59 2025 +0100 Timestamp: 1736712719 Small cleanup of nnue_feature_transformer.h Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 285760 W: 73716 L: 73768 D: 138276 Elo -0.06 Ptnml(0-2): 777, 30775, 79851, 30677, 800 https://tests.stockfishchess.org/tests/view/676f78681a2f267f205485aa closes https://github.com/official-stockfish/Stockfish/pull/5745 No functional change 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: Shawn Xu
Date: Sun Jan 12 21:11:27 2025 +0100 Timestamp: 1736712687 Simplify Razoring Passed Non-regression STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 95584 W: 24906 L: 24750 D: 45928 Elo +0.57 Ptnml(0-2): 285, 11227, 24632, 11343, 305 https://tests.stockfishchess.org/tests/view/675e0ed286d5ee47d95429ee Passed Non-regression LTC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 191292 W: 48637 L: 48589 D: 94066 Elo +0.09 Ptnml(0-2): 97, 21061, 53276, 21121, 91 https://tests.stockfishchess.org/tests/view/675f08c686d5ee47d9542be3 closes https://github.com/official-stockfish/Stockfish/pull/5724 Bench: 1286274 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: sscg13
Date: Sun Jan 12 21:09:58 2025 +0100 Timestamp: 1736712598 Use same pawn value in both nets when doing material scaling of eval Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 221312 W: 57291 L: 57274 D: 106747 Elo +0.03 Ptnml(0-2): 760, 26152, 56841, 26117, 786 https://tests.stockfishchess.org/tests/view/676e2a101a2f267f20548453 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 176808 W: 45084 L: 45023 D: 86701 Elo +0.12 Ptnml(0-2): 112, 19418, 49286, 19473, 115 https://tests.stockfishchess.org/tests/view/676f424d1a2f267f2054857f closes https://github.com/official-stockfish/Stockfish/pull/5741 Bench: 1121800 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: Daniel Monroe
Date: Mon Jan 6 00:48:05 2025 +0100 Timestamp: 1736120885 Remove non-functional std::min() closes https://github.com/official-stockfish/Stockfish/pull/5749 No functional change 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: Daniel Monroe
Date: Mon Jan 6 00:46:30 2025 +0100 Timestamp: 1736120790 Corrplexity for futility pruning Add corrhist-based term to futility margin Inspired by a recent patch of Shawn Xu, this tweak increases the margin over beta needed to futility prune based on the correction history, with an offset. Passed STC LLR: 2.97 (-2.94,2.94) <0.00,2.00> Total: 545504 W: 141957 L: 140885 D: 262662 Elo +0.68 Ptnml(0-2): 1829, 64226, 139551, 65336, 1810 https://tests.stockfishchess.org/tests/view/67634a8386d5ee47d95439db Passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 125994 W: 32199 L: 31695 D: 62100 Elo +1.39 Ptnml(0-2): 97, 13742, 34798, 14280, 80 https://tests.stockfishchess.org/tests/view/6765cf9986d5ee47d9544217 closes https://github.com/official-stockfish/Stockfish/pull/5748 Bench: 999324 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: Shawn Xu
Date: Mon Jan 6 00:45:28 2025 +0100 Timestamp: 1736120728 Update Copyright Year closes https://github.com/official-stockfish/Stockfish/pull/5747 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: Shawn Xu
Date: Mon Jan 6 00:44:25 2025 +0100 Timestamp: 1736120665 Cleanup stats entry Prevents potential issue caused by publicly inheriting from STL container types closes https://github.com/official-stockfish/Stockfish/pull/5746 No functional change 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: Shawn Xu
Date: Mon Jan 6 00:43:49 2025 +0100 Timestamp: 1736120629 Remove some incorrectly marked const qualifiers closes https://github.com/official-stockfish/Stockfish/pull/5744 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: Shawn Xu
Date: Mon Jan 6 00:43:37 2025 +0100 Timestamp: 1736120617 Simplify post-lmr conthist bonus Passed Non-regression STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 49184 W: 12735 L: 12528 D: 23921 Elo +1.46 Ptnml(0-2): 134, 5746, 12647, 5909, 156 https://tests.stockfishchess.org/tests/view/6765cd2e86d5ee47d954420e Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 177270 W: 45227 L: 45166 D: 86877 Elo +0.12 Ptnml(0-2): 132, 19498, 49302, 19583, 120 https://tests.stockfishchess.org/tests/view/676721fd86d5ee47d9544489 closes https://github.com/official-stockfish/Stockfish/pull/5734 Bench: 1042099 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: Michael Chaly
Date: Mon Jan 6 00:40:05 2025 +0100 Timestamp: 1736120405 Allow Pv nodes at certain conditions to spawn zero window searches deeper than default In current case it's allowed if there is no best move. Passed STC: https://tests.stockfishchess.org/tests/view/67640fd586d5ee47d9543d5a LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 392480 W: 102038 L: 101192 D: 189250 Elo +0.75 Ptnml(0-2): 1303, 46287, 100253, 47055, 1342 Passed LTC: https://tests.stockfishchess.org/tests/view/67671a4686d5ee47d9544476 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 128616 W: 32941 L: 32433 D: 63242 Elo +1.37 Ptnml(0-2): 84, 13997, 35634, 14513, 80 closes https://github.com/official-stockfish/Stockfish/pull/5733 Bench: 1095871 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: Sun Dec 22 15:29:42 2024 +0100 Timestamp: 1734877782 Simplify Zobrist keys for captures The Zobrist keys for NO_PIECE are 0 so no need to special case captures. Also the TranspositionTable reference passed to do_null_move() can be const. STC Simplification: https://tests.stockfishchess.org/tests/view/6764a79a86d5ee47d9544005 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 114240 W: 29654 L: 29523 D: 55063 Elo +0.40 Ptnml(0-2): 329, 12360, 31620, 12473, 338 closes https://github.com/official-stockfish/Stockfish/pull/5731 No functional change see source |
| Windows x64 for Haswell CPUs 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: Sun Dec 22 15:28:15 2024 +0100 Timestamp: 1734877695 Simplify away reductions adjustment for multithreaded search Seem to no longer bring measurable benefit. Passed STC SMP simplification: https://tests.stockfishchess.org/tests/view/6753561a86d5ee47d954151f LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 38000 W: 9864 L: 9656 D: 18480 Elo +1.90 Ptnml(0-2): 53, 4177, 10320, 4409, 41 Passed LTC SMP simplification: https://tests.stockfishchess.org/tests/view/6753d75f86d5ee47d9541669 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 258674 W: 66314 L: 66335 D: 126025 Elo -0.03 Ptnml(0-2): 77, 26957, 75303, 26910, 90 Passed 16 threads LTC simplification: https://tests.stockfishchess.org/tests/view/675a066286d5ee47d9542296 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 221804 W: 56950 L: 56936 D: 107918 Elo +0.02 Ptnml(0-2): 34, 21491, 67839, 21503, 35 closes https://github.com/official-stockfish/Stockfish/pull/5729 Bench: 1294909 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: Disservin
Date: Sun Dec 22 15:27:40 2024 +0100 Timestamp: 1734877660 Workaround for clang-format bug closes https://github.com/official-stockfish/Stockfish/pull/5728 No functional change see source |
| Windows x64 for Haswell CPUs 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: Shawn Xu
Date: Sun Dec 22 15:26:39 2024 +0100 Timestamp: 1734877599 Adjust LMR with correction history A positive constant increase in base reduction is applied to counter the decrease in average reduction from this tweak. Passed STC: LLR: 2.98 (-2.94,2.94) <0.00,2.00> Total: 109216 W: 28415 L: 27989 D: 52812 Elo +1.36 Ptnml(0-2): 310, 12848, 27911, 13184, 355 https://tests.stockfishchess.org/tests/view/6760bb0e86d5ee47d9542f26 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 66918 W: 17073 L: 16694 D: 33151 Elo +1.97 Ptnml(0-2): 33, 7175, 18666, 7550, 35 https://tests.stockfishchess.org/tests/view/6761e10f86d5ee47d95431fa closes https://github.com/official-stockfish/Stockfish/pull/5727 Bench: 1294909 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: Sun Dec 22 15:24:09 2024 +0100 Timestamp: 1734877449 Make reductionScale smoother Making the second part of the formula smoother, changing it to a linear function, increasing steadily as reductionScale increases and at the same time, it should be a little bit simpler, therefore the simplification bounds. Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 83040 W: 21493 L: 21322 D: 40225 Elo +0.72 Ptnml(0-2): 252, 9848, 21209, 9899, 312 https://tests.stockfishchess.org/tests/view/6762145486d5ee47d9543242 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 230124 W: 58485 L: 58478 D: 113161 Elo +0.01 Ptnml(0-2): 175, 25620, 63484, 25589, 194 https://tests.stockfishchess.org/tests/view/6762d4ef86d5ee47d9543367 closes https://github.com/official-stockfish/Stockfish/pull/5725 Bench: 1204658 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: Sun Dec 22 15:20:25 2024 +0100 Timestamp: 1734877225 Add CI test with glibcxx assertions enabled Re: https://github.com/official-stockfish/Stockfish/pull/5721#pullrequestreview-2504542601 closes https://github.com/official-stockfish/Stockfish/pull/5723 No functional change 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: Sun Dec 22 15:19:53 2024 +0100 Timestamp: 1734877193 Cleanup Evaluate Calls Makes code a bit easier to read as well. closes https://github.com/official-stockfish/Stockfish/pull/5722 No functional change see source |
| 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: Shawn Xu
Date: Sun Dec 22 15:19:13 2024 +0100 Timestamp: 1734877153 Prevent out of bounds access of dbg info arrays closes https://github.com/official-stockfish/Stockfish/pull/5721 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: Daniel Monroe
Date: Sun Dec 22 15:17:55 2024 +0100 Timestamp: 1734877075 Remove time reduction for recaptures Passed simplification STC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 54016 W: 14098 L: 13902 D: 26016 Elo +1.26 Ptnml(0-2): 165, 5797, 14919, 5931, 196 https://tests.stockfishchess.org/tests/view/6758a90486d5ee47d954201e Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 296940 W: 75631 L: 75689 D: 145620 Elo -0.07 Ptnml(0-2): 145, 28928, 90384, 28866, 147 https://tests.stockfishchess.org/tests/view/6758df7a86d5ee47d9542091 closes https://github.com/official-stockfish/Stockfish/pull/5719 Bench: 1148169 see source |