| 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: Taras Vuk
Date: Sat Oct 21 10:34:12 2023 +0200 Timestamp: 1697877252 Subtract the margin from the value returned by ProbCut This patch subtracts the margin from the value returned by ProbCut. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 46112 W: 11940 L: 11610 D: 22562 Elo +2.49 Ptnml(0-2): 131, 5318, 11842, 5620, 145 https://tests.stockfishchess.org/tests/view/652ea42ade6d262d08d329dd Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 86880 W: 22192 L: 21776 D: 42912 Elo +1.66 Ptnml(0-2): 43, 9213, 24510, 9633, 41 https://tests.stockfishchess.org/tests/view/652f70ffde6d262d08d33e8d closes https://github.com/official-stockfish/Stockfish/pull/4835 bench: 1135313 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: FauziAkram
Date: Sat Oct 21 10:31:51 2023 +0200 Timestamp: 1697877111 Removing history condition Removing the bad history condition from the skip futility pruning formula. Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 142688 W: 36420 L: 36317 D: 69951 Elo +0.25 Ptnml(0-2): 481, 16653, 36970, 16762, 478 https://tests.stockfishchess.org/tests/view/65270a663125598fc7eb8c67 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 435378 W: 110723 L: 110925 D: 213730 Elo -0.16 Ptnml(0-2): 278, 47251, 122788, 47139, 233 https://tests.stockfishchess.org/tests/view/6528595f3125598fc7eba8f5 closes https://github.com/official-stockfish/Stockfish/pull/4834 Bench: 1110579 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Date: Sat Oct 21 10:28:55 2023 +0200 Timestamp: 1697876935 Remove outdated Tile naming. cleanup variable naming after #4816 closes #4833 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: Shahin M. Shahin
Date: Sat Oct 21 10:26:09 2023 +0200 Timestamp: 1697876769 Cleanup qsearch continuation histories Only (ss-1) and (ss-2) are used in qsearch. closes https://github.com/official-stockfish/Stockfish/pull/4828 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: FauziAkram
Date: Sat Oct 21 10:25:03 2023 +0200 Timestamp: 1697876703 Standardize Comments use double slashes (//) only for comments. closes #4820 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: Stéphane Nicolet
Date: Sat Oct 21 10:15:48 2023 +0200 Timestamp: 1697876148 Reformat some comments and conditions closes https://github.com/official-stockfish/Stockfish/pull/4814 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: Shahin M. Shahin
Date: Sat Oct 21 10:01:26 2023 +0200 Timestamp: 1697875286 Fix greater than TB scores in null move pruning. This patch is a simplification and a fix to dealing with null moves scores that returns proven mates or TB scores by preventing 'null move pruning' if the nullvalue is in that range. Current solution downgrades nullValues on the non-PV node but the value can be used in a transposed PV-node to the same position afterwards (Triangulation), the later is prone to propagate a wrong score (96.05) to root that will not be refuted unless we search further. Score of (96.05) can be obtained be two methods, maxim static-eval returned on Pv update (mostly qSearch) this downgrade (clamp) in NMP and theoretically can happen with or without TBs but the second scenario is more dangerous than the first. This fixes the reproducible case in very common scenarios with TBs as shown in the debugging at discord. Fixes: #4699 Passed STC: https://tests.stockfishchess.org/tests/view/64c1eca8dc56e1650abba6f9 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 670048 W: 171132 L: 171600 D: 327316 Elo -0.24 Ptnml(0-2): 2134, 75687, 179820, 75279, 2104 Passed LTC: https://tests.stockfishchess.org/tests/view/64c5e130dc56e1650abc0438 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 92868 W: 23642 L: 23499 D: 45727 Elo +0.53 Ptnml(0-2): 52, 9509, 27171, 9648, 54 closes https://github.com/official-stockfish/Stockfish/pull/4715 Bench: 1327410 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: Sat Oct 14 16:52:35 2023 +0200 Timestamp: 1697295155 Use more continuation histories. This patch allows stats updates and movepicker bonuses for continuation history 3 plies deep - so counter counter move. Updates and movepicker usage are done with 1/4 multiplier compared to other histories. Passed STC: https://tests.stockfishchess.org/tests/view/6528f28d3125598fc7ebb5a3 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 161344 W: 41369 L: 40868 D: 79107 Elo +1.08 Ptnml(0-2): 535, 18720, 41679, 19185, 553 Passed LTC: https://tests.stockfishchess.org/tests/view/652a397a3125598fc7ebd1d6 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 48564 W: 12556 L: 12215 D: 23793 Elo +2.44 Ptnml(0-2): 25, 5149, 13595, 5486, 27 closes https://github.com/official-stockfish/Stockfish/pull/4827 bench 1327410 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: Tue Oct 10 17:45:32 2023 +0200 Timestamp: 1696952732 Search parameters tune at 180+1.8 Passed VLTC: https://tests.stockfishchess.org/tests/view/65200c58ac577114367280bc LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 146180 W: 37407 L: 36988 D: 71785 Elo +1.00 Ptnml(0-2): 21, 14474, 43675, 14905, 15 Passed VLTC SMP: https://tests.stockfishchess.org/tests/view/652403da3125598fc7eb4b6d LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 57580 W: 15061 L: 14739 D: 27780 Elo +1.94 Ptnml(0-2): 2, 5001, 18460, 5327, 0 closes https://github.com/official-stockfish/Stockfish/pull/4826 Bench: 1099336 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: Taras Vuk
Date: Sun Oct 8 07:56:07 2023 +0200 Timestamp: 1696744567 Skip futility pruning if ttMove has bad history Passed STC: LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 52416 W: 13465 L: 13128 D: 25823 Elo +2.23 Ptnml(0-2): 128, 6024, 13604, 6287, 165 https://tests.stockfishchess.org/tests/view/651fadd4ac577114367277bf Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 87348 W: 22234 L: 21818 D: 43296 Elo +1.65 Ptnml(0-2): 38, 9240, 24698, 9664, 34 https://tests.stockfishchess.org/tests/view/65201932ac57711436728218 closes https://github.com/official-stockfish/Stockfish/pull/4825 bench: 1246560 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: gabe
Date: Sun Oct 8 07:52:16 2023 +0200 Timestamp: 1696744336 Avoid recomputing moveCountPruning In search, when moveCountPruning becomes true, it can never turn false again. Passed STC https://tests.stockfishchess.org/tests/view/652075ceac57711436728aac LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 136448 W: 34923 L: 34472 D: 67053 Elo +1.15 Ptnml(0-2): 420, 15094, 36767, 15501, 442 closes https://github.com/official-stockfish/Stockfish/pull/4823 Non 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: candirufish
Date: Sun Oct 8 07:50:03 2023 +0200 Timestamp: 1696744203 Razor more if ss+1 cutoffCnt > 3 STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 221760 W: 56726 L: 56144 D: 108890 Elo +0.91 Ptnml(0-2): 655, 25453, 58123, 25953, 696 https://tests.stockfishchess.org/tests/view/651d34dbcff46e538ee05d91 LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 130326 W: 33188 L: 32681 D: 64457 Elo +1.35 Ptnml(0-2): 69, 13949, 36620, 14456, 69 https://tests.stockfishchess.org/tests/view/651f844eac577114367273d5 closes https://github.com/official-stockfish/Stockfish/pull/4822 bench: 1291708 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: Stefan Geschwentner
Date: Sun Oct 8 07:46:26 2023 +0200 Timestamp: 1696743986 Simplify collection of bad moves for history updates. 1. collect only the first 32 moves searched and ignore the rest. So late bad moves get no further negative history updates. 2. collect now for quiet moves also at most 32 bad moves STC: https://tests.stockfishchess.org/tests/view/6517b3aeb3e74811c8af5651 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 51168 W: 13013 L: 12810 D: 25345 Elo +1.38 Ptnml(0-2): 120, 6006, 13186, 6095, 177 LTC: https://tests.stockfishchess.org/tests/view/651adafecff46e538ee02734 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 109866 W: 27786 L: 27656 D: 54424 Elo +0.41 Ptnml(0-2): 52, 11816, 31069, 11942, 54 closes https://github.com/official-stockfish/Stockfish/pull/4818 Bench: 1338617 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 Oct 8 07:42:39 2023 +0200 Timestamp: 1696743759 Optimize the most common update accumalator cases w/o tiling In the most common case where we only update a single state it's faster to not use temporary accumulation registers and tiling. (Also includes a couple of small cleanups.) passed STC https://tests.stockfishchess.org/tests/view/651918e3cff46e538ee0023b LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 34944 W: 8989 L: 8687 D: 17268 Elo +3.00 Ptnml(0-2): 88, 3743, 9512, 4037, 92 A simpler version https://tests.stockfishchess.org/tests/view/65190dfacff46e538ee00155 also passed but this version is stronger still https://tests.stockfishchess.org/tests/view/6519b95fcff46e538ee00fa2 closes https://github.com/official-stockfish/Stockfish/pull/4816 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: Stéphane Nicolet
Date: Sun Oct 8 07:41:16 2023 +0200 Timestamp: 1696743676 Remove one test in the move loop Simplification passed STC test: https://tests.stockfishchess.org/tests/view/6519fc91cff46e538ee014f6 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 191264 W: 48550 L: 48501 D: 94213 Elo +0.09 Ptnml(0-2): 576, 21529, 51392, 21540, 595 closes #4815 Non 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: Robert Nurnberg @ elitebook
Date: Sun Oct 8 07:38:13 2023 +0200 Timestamp: 1696743493 Update links in license matches https://www.gnu.org/licenses/gpl-3.0.txt closes https://github.com/official-stockfish/Stockfish/pull/4813 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: mstembera
Date: Sun Oct 8 07:37:01 2023 +0200 Timestamp: 1696743421 Remove handcrafted MMX code too small a benefit to maintain this old target closes https://github.com/official-stockfish/Stockfish/pull/4804 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: Linmiao Xu
Date: Fri Sep 29 22:30:27 2023 +0200 Timestamp: 1696019427 Update default net to nn-0000000000a0.nnue This is a later epoch from the same experiment that led to the previous master net. In training stage 6, max-epoch was raised to 1,200 near the end of the first 1,000 epochs. For more details, see https://github.com/official-stockfish/Stockfish/pull/4795 Local elo at 25k nodes per move (vs. L1-2048 nn-1ee1aba5ed4c.nnue) ep1079 : 15.6 +/- 1.2 Passed STC: https://tests.stockfishchess.org/tests/view/651503b3b3e74811c8af1e2a LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 29408 W: 7607 L: 7304 D: 14497 Elo +3.58 Ptnml(0-2): 97, 3277, 7650, 3586, 94 Passed LTC: https://tests.stockfishchess.org/tests/view/651585ceb3e74811c8af2a5f LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 73164 W: 18828 L: 18440 D: 35896 Elo +1.84 Ptnml(0-2): 30, 7749, 20644, 8121, 38 closes https://github.com/official-stockfish/Stockfish/pull/4810 Bench: 1453057 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: cj5716
Date: Fri Sep 29 22:28:34 2023 +0200 Timestamp: 1696019314 Skip moves-loop pruning in qsearch if we have only pawns At first my idea was only to cover movecount and futility pruning, but @peregrineshahin suggested to test it on all moves-loop pruning and it worked. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 167968 W: 42970 L: 42480 D: 82518 Elo +1.01 Ptnml(0-2): 444, 18324, 46002, 18726, 488 https://tests.stockfishchess.org/tests/view/6511181a55b420c569d0d54c Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 40794 W: 10496 L: 10182 D: 20116 Elo +2.67 Ptnml(0-2): 12, 4021, 12025, 4319, 20 https://tests.stockfishchess.org/tests/view/6512ccc4b3e74811c8aee86c closes https://github.com/official-stockfish/Stockfish/pull/4809 Bench: 1338472 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: Sebastian Buchwald
Date: Fri Sep 29 22:22:40 2023 +0200 Timestamp: 1696018960 Use C++17 variable templates for type traits The C++17 variable templates are slightly more readable and allow us to remove the typename keyword in a few cases. closes https://github.com/official-stockfish/Stockfish/pull/4806 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: mstembera
Date: Fri Sep 29 22:19:08 2023 +0200 Timestamp: 1696018748 Remove unused see_ge() code closes https://github.com/official-stockfish/Stockfish/pull/4805 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: FauziAkram
Date: Fri Sep 29 22:18:17 2023 +0200 Timestamp: 1696018697 Improve grammar of comments closes https://github.com/official-stockfish/Stockfish/pull/4801 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: FauziAkram
Date: Fri Sep 29 22:12:46 2023 +0200 Timestamp: 1696018366 Simplify pawn count in evaluation This simplifies the evaluation by removing the unnecessary pawn count term when combining nnue and optimism values. Passed STC LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 61472 W: 15748 L: 15554 D: 30170 Elo +1.10 Ptnml(0-2): 191, 7123, 15933, 7279, 210 https://tests.stockfishchess.org/tests/view/650c34cf7ca0d3f7bbf264ff Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 81264 W: 20657 L: 20500 D: 40107 Elo +0.67 Ptnml(0-2): 30, 8713, 22997, 8854, 38 https://tests.stockfishchess.org/tests/view/650cc30efb151d43ae6d5987 closes https://github.com/official-stockfish/Stockfish/pull/4800 Bench: 1530568 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: Jasper Shovelton
Date: Fri Sep 29 22:07:10 2023 +0200 Timestamp: 1696018030 Increment minor section number from 3.7.1 to 3.8.1. Pext has nothing to do with git commit sha/date, so separate the two sub-sections. closes https://github.com/official-stockfish/Stockfish/pull/4785 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: Sun Sep 24 20:04:42 2023 +0200 Timestamp: 1695578682 Explicitly invoke shell in some cases the permission on the script might be incorrect (zip downloads?). Explicitly invoke the shell closes https://github.com/official-stockfish/Stockfish/pull/4803 No functional change see source |