| 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: Fri Mar 21 11:09:28 2025 +0100 Timestamp: 1742551768 Add dbg_clear helper function closes https://github.com/official-stockfish/Stockfish/pull/5921 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: Carlos Esparza
Date: Fri Mar 21 11:09:27 2025 +0100 Timestamp: 1742551767 Simplify risk_tolerance + avoid overflow passed simplification STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 73984 W: 19058 L: 18879 D: 36047 Elo +0.84 Ptnml(0-2): 232, 8735, 18866, 8940, 219 https://tests.stockfishchess.org/tests/view/67c269a38200cf1034c9baf9 passed simplification LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 39288 W: 10033 L: 9833 D: 19422 Elo +1.77 Ptnml(0-2): 14, 4168, 11086, 4356, 20 https://tests.stockfishchess.org/tests/view/67c34f8c8200cf1034c9bda1 closes https://github.com/official-stockfish/Stockfish/pull/5919 Bench: 2050046 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: Fri Mar 21 11:03:31 2025 +0100 Timestamp: 1742551411 Improve Perft Testing Added #5909 problematic position and chess-library DFRC positions to perft testing. Additional work done by @Disservin to clean up and improve error reporting. closes https://github.com/official-stockfish/Stockfish/pull/5917 No functional change Co-authored-by: disservin <> 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: Fri Mar 21 11:02:19 2025 +0100 Timestamp: 1742551339 Reapply #5909 This version fixes the logic of `gives_check`, which was identified to be the cause of illegal moves. closes https://github.com/official-stockfish/Stockfish/pull/5914 No functional change Co-authored-by: Robert Nürnberg <> Co-authored-by: gab8192 <> 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: xu-shawn
Date: Fri Feb 28 09:50:59 2025 +0100 Timestamp: 1740732659 Revert "Replace aligned() function with line_bb() and simplify king piece detection" (#5915) closes https://github.com/official-stockfish/Stockfish/pull/5915 No functional change Co-authored-by: Robert Nürnberg <> 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: Thu Feb 27 20:40:56 2025 +0100 Timestamp: 1740685256 VVLTC Search Tune Passed VVLTC with STC bounds: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 15788 W: 4106 L: 3868 D: 7814 Elo +5.24 Ptnml(0-2): 0, 1324, 5009, 1560, 1 https://tests.stockfishchess.org/tests/view/67bf2ddd6e569f6234102ade Passed VVLTC with LTC bounds: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 13622 W: 3620 L: 3368 D: 6634 Elo +6.43 Ptnml(0-2): 3, 1190, 4170, 1448, 0 https://tests.stockfishchess.org/tests/view/67c04308c8f7c4c0632d8055 closes https://github.com/official-stockfish/Stockfish/pull/5910 Bench: 1823605 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: Jake Senne
Date: Thu Feb 27 20:38:03 2025 +0100 Timestamp: 1740685083 Replace aligned() function with line_bb() and simplify king piece detection From https://discord.com/channels/435943710472011776/813919248455827515/1342267241168900228 Saves 6 instructions closes https://github.com/official-stockfish/Stockfish/pull/5909 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: FauziAkram
Date: Thu Feb 27 20:34:49 2025 +0100 Timestamp: 1740684889 Remove two unnecessary divisions Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 280768 W: 72187 L: 72236 D: 136345 Elo -0.06 Ptnml(0-2): 815, 33131, 72550, 33064, 824 https://tests.stockfishchess.org/tests/view/67bcf7afe670525923b8a101 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 108684 W: 27666 L: 27536 D: 53482 Elo +0.42 Ptnml(0-2): 40, 11768, 30606, 11878, 50 https://tests.stockfishchess.org/tests/view/67be472ed8d5c2c657c52cb8 closes https://github.com/official-stockfish/Stockfish/pull/5908 Bench: 2400689 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: Thu Feb 27 20:31:04 2025 +0100 Timestamp: 1740684664 Simplify NMP Conditions Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 142400 W: 36883 L: 36779 D: 68738 Elo +0.25 Ptnml(0-2): 467, 16804, 36571, 16874, 484 https://tests.stockfishchess.org/tests/view/67bd1898e4a8d7152b974ef1 Passed Non-regression LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 251868 W: 63905 L: 63920 D: 124043 Elo -0.02 Ptnml(0-2): 133, 27480, 70708, 27495, 118 https://tests.stockfishchess.org/tests/view/67bd1898e4a8d7152b974ef1 closes https://github.com/official-stockfish/Stockfish/pull/5906 Bench: 2188400 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: Thu Feb 27 20:30:44 2025 +0100 Timestamp: 1740684644 Combine last 3 add/remove operations https://tests.stockfishchess.org/tests/view/67ad587052879dfd14d7e8a5 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 45856 W: 12177 L: 11855 D: 21824 Elo +2.44 Ptnml(0-2): 176, 4845, 12588, 5119, 200 The two most common cases are when added and removed counts are equal and when they are off by 1. When they are off by 1 we currently do a pass combining 2 and then an extra pass for the last 1. This patch does a single combined pass on the final 3 instead. Tested on top of the simplification in https://github.com/official-stockfish/Stockfish/pull/5901 closes https://github.com/official-stockfish/Stockfish/pull/5902 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: mstembera
Date: Thu Feb 27 20:30:10 2025 +0100 Timestamp: 1740684610 Handle updating the small accumulator the same way as the big one https://tests.stockfishchess.org/tests/view/67abfe1ca04df5eb8dbebf0b LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 153088 W: 40072 L: 39979 D: 73037 Elo +0.21 Ptnml(0-2): 619, 16728, 41764, 16807, 626 closes https://github.com/official-stockfish/Stockfish/pull/5901 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: Mon Feb 24 19:16:26 2025 +0100 Timestamp: 1740420986 Simplify bestvalue update formula Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 124960 W: 32598 L: 32472 D: 59890 Elo +0.35 Ptnml(0-2): 480, 14852, 31694, 14970, 484 https://tests.stockfishchess.org/tests/view/67b348bae00eea114cdba37d Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 150306 W: 38220 L: 38132 D: 73954 Elo +0.20 Ptnml(0-2): 98, 16430, 42005, 16526, 94 https://tests.stockfishchess.org/tests/view/67b5e37918a66624a7a3f751 closes https://github.com/official-stockfish/Stockfish/pull/5898 Bench: 2146010 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: Mon Feb 24 19:15:32 2025 +0100 Timestamp: 1740420932 Check maximum time every iteration This fixes a TCEC timeloss, where slow DTZ TB7 access, in combination with syzygy PV extension, led to a timeloss. While the extension code correctly aborted after spending moveOverhead/2 time, the mainThread did not search sufficient nodes (512 in > 1s) to trigger the stop in check_time. At the same time, totalTime exceeded tm.maximum() due to the factors multiplying tm.optimum(). This corner case is fixed by checking also against the tm.maximum() at each iteration. Even though this problem can't be triggered on fishtest, the patch was verified there. Passed STC: https://tests.stockfishchess.org/tests/view/67b99e1be99f8640b318810d LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 136832 W: 35625 L: 35518 D: 65689 Elo +0.27 Ptnml(0-2): 499, 14963, 37431, 14978, 545 closes https://github.com/official-stockfish/Stockfish/pull/5896 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: Michael Chaly
Date: Mon Feb 24 19:14:04 2025 +0100 Timestamp: 1740420844 Make Pv search shallower in some cases Conditions are the same as they are for doShallowerSearch, just that they also apply for cases where LMR wasn't reducing anything - if result is bad enough reduce search depth of PV search by 1. Passed STC: https://tests.stockfishchess.org/tests/view/67b9d2aca49c651c2caac818 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 29216 W: 7731 L: 7424 D: 14061 Elo +3.65 Ptnml(0-2): 87, 3345, 7473, 3580, 123 Passed LTC: https://tests.stockfishchess.org/tests/view/67ba538c01f3463ae1d35e69 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 33168 W: 8529 L: 8219 D: 16420 Elo +3.25 Ptnml(0-2): 12, 3505, 9262, 3771, 34 closes https://github.com/official-stockfish/Stockfish/pull/5895 Bench: 2290732 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: Myself
Date: Mon Feb 24 19:12:35 2025 +0100 Timestamp: 1740420755 Add risk tolerance calculation https://tests.stockfishchess.org/tests/view/67b1db2188b11e2400eb06ae Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 123552 W: 32388 L: 31938 D: 59226 Elo +1.27 Ptnml(0-2): 487, 14520, 31345, 14904, 520 Passed LTC: https://tests.stockfishchess.org/tests/view/67b3d53f154c4df4fc4b1f43 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 206928 W: 52916 L: 52246 D: 101766 Elo +1.12 Ptnml(0-2): 159, 22546, 57394, 23196, 169 closes https://github.com/official-stockfish/Stockfish/pull/5893 Bench: 2705449 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: Disservin
Date: Mon Feb 24 19:10:38 2025 +0100 Timestamp: 1740420638 Remove duplicated info string printing Currently "info string" is being printed twice for the network arch ``` info string info string NNUE evaluation using nn-1c0000000000.nnue (133MiB, (22528, 3072, 15, 32, 1)) info string info string NNUE evaluation using nn-37f18f62d772.nnue (6MiB, (22528, 128, 15, 32, 1)) ``` closes https://github.com/official-stockfish/Stockfish/pull/5889 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 Feb 24 19:09:52 2025 +0100 Timestamp: 1740420592 Add scaling note to futility pruning Note that both patches below effectively reduces the frequency of futility pruning. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 51680 W: 13599 L: 13253 D: 24828 Elo +2.33 Ptnml(0-2): 217, 6056, 12959, 6380, 228 https://tests.stockfishchess.org/tests/view/67ac218fa04df5eb8dbebf26 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 51798 W: 13338 L: 12986 D: 25474 Elo +2.36 Ptnml(0-2): 42, 5584, 14310, 5906, 57 https://tests.stockfishchess.org/tests/view/67acf04152879dfd14d7e846 Regression at STC SMP: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 231552 W: 60226 L: 59642 D: 111684 Elo +0.88 Ptnml(0-2): 565, 25994, 62031, 26664, 522 https://tests.stockfishchess.org/tests/view/67ae390c1a4c73ae1f930dbf Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 22560 W: 6022 L: 5725 D: 10813 Elo +4.57 Ptnml(0-2): 87, 2524, 5762, 2819, 88 https://tests.stockfishchess.org/tests/view/67ac202aa04df5eb8dbebf22 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 66138 W: 16953 L: 16572 D: 32613 Elo +2.00 Ptnml(0-2): 62, 7103, 18360, 7480, 64 https://tests.stockfishchess.org/tests/view/67ad47d852879dfd14d7e899 Regression at VVLTC SMP: LLR: -2.94 (-2.94,2.94) <-1.75,0.25> Total: 29138 W: 7408 L: 7655 D: 14075 Elo -2.95 Ptnml(0-2): 0, 2816, 9189, 2559, 5 https://tests.stockfishchess.org/tests/view/67b159ce6c6b9e172ad1598f closes https://github.com/official-stockfish/Stockfish/pull/5888 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: Nonlinear2
Date: Mon Feb 24 19:09:28 2025 +0100 Timestamp: 1740420568 se separate parameters for stat values The code has been refactored to remove the `stat_bonus` and `stat_malus` functions, as the code for each bonus/malus is now different. This allows for future tests to modify these formulas individually. Passed LTC with STC bounds: https://tests.stockfishchess.org/tests/view/67b115dd6c6b9e172ad1592f LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 75756 W: 19393 L: 19044 D: 37319 Elo +1.60 Ptnml(0-2): 60, 8251, 20913, 8588, 66 Passed LTC with LTC bounds: https://tests.stockfishchess.org/tests/view/67af5f5d6c6b9e172ad15765 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 108126 W: 27880 L: 27412 D: 52834 Elo +1.50 Ptnml(0-2): 85, 11786, 29866, 12228, 98 closes https://github.com/official-stockfish/Stockfish/pull/5887 Bench: 2809143 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 Feb 24 19:07:58 2025 +0100 Timestamp: 1740420478 Use same term for small and large net for nnue complexity adjustment Passed simplification STC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 386496 W: 100682 L: 100850 D: 184964 Elo -0.15 Ptnml(0-2): 1686, 46399, 97218, 46287, 1658 https://tests.stockfishchess.org/tests/view/67a9cc6d851bb0f25324449e Passed rebased simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 160884 W: 41090 L: 41012 D: 78782 Elo +0.17 Ptnml(0-2): 133, 17883, 44321, 17983, 122 https://tests.stockfishchess.org/tests/view/67aef2e91a4c73ae1f930e85 closes https://github.com/official-stockfish/Stockfish/pull/5886 Bench: 2962718 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: Mon Feb 24 19:07:29 2025 +0100 Timestamp: 1740420449 Use neon_m128_reduce_add_epi32 for NEON vector reduction Accomplishing the entire horizontal addition in a single NEON instruction closes https://github.com/official-stockfish/Stockfish/pull/5885 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: Mon Feb 24 19:04:59 2025 +0100 Timestamp: 1740420299 Small code cleanup Use std::is_arithmetic_v as it is the more modern and concise way to check for arithmetic types. While at it, fixing a static assert in misc.h, thanks to Shawn and Disservin for helping. closes https://github.com/official-stockfish/Stockfish/pull/5883 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: Daniel Monroe
Date: Mon Feb 24 19:03:19 2025 +0100 Timestamp: 1740420199 Simplify ttcut depth condition Simplify ttcut depth condition in a recent tweak of Nonlinear (PR #5876) Passed simplification STC LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 235328 W: 61646 L: 61644 D: 112038 Elo +0.00 Ptnml(0-2): 1039, 27947, 59676, 27977, 1025 https://tests.stockfishchess.org/tests/view/67abc7fba04df5eb8dbeb442 Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 63744 W: 16306 L: 16128 D: 31310 Elo +0.97 Ptnml(0-2): 58, 6918, 17748, 7084, 64 https://tests.stockfishchess.org/tests/view/67abd776a04df5eb8dbeb9c1 closes https://github.com/official-stockfish/Stockfish/pull/5877 Bench: 2667779 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: Carlos Esparza
Date: Mon Feb 24 19:01:23 2025 +0100 Timestamp: 1740420083 Replace hint_common_parent_position() by backwards accumulator updates Only calls to `evaluate()` now trigger NNUE accumulator updates. To make sure that we are likely to find parent positions from which to update the accumulators we perform a backwards NNUE update whenever we compute the accumulator from scratch for some position. passed STC LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 39680 W: 10474 L: 10164 D: 19042 Elo +2.71 Ptnml(0-2): 171, 4068, 11042, 4398, 161 https://tests.stockfishchess.org/tests/view/67a27f26eb183d11c65945be passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 337308 W: 86408 L: 85550 D: 165350 Elo +0.88 Ptnml(0-2): 276, 30551, 106126, 31441, 260 https://tests.stockfishchess.org/tests/view/67a287efeb183d11c65945ee then simplified: STC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 28608 W: 7641 L: 7413 D: 13554 Elo +2.77 Ptnml(0-2): 132, 3036, 7744, 3256, 136 https://tests.stockfishchess.org/tests/view/67a4703719f522d3866d3345 LTC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 200226 W: 51026 L: 50990 D: 98210 Elo +0.06 Ptnml(0-2): 170, 18468, 62799, 18508, 168 https://tests.stockfishchess.org/tests/view/67a4f255229c1a170cc08964 The version in this PR is a bit different from the simplified version, but it's compile-time changes only. closes https://github.com/official-stockfish/Stockfish/pull/5870 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: Thu Feb 13 20:18:35 2025 +0100 Timestamp: 1739474315 FutilityValue formula tweak Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 29600 W: 7979 L: 7662 D: 13959 Elo +3.72 Ptnml(0-2): 138, 3446, 7324, 3745, 147 https://tests.stockfishchess.org/tests/view/67ac7dff52879dfd14d7e7da Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 49662 W: 12850 L: 12502 D: 24310 Elo +2.43 Ptnml(0-2): 41, 5354, 13689, 5710, 37 https://tests.stockfishchess.org/tests/view/67acc1b252879dfd14d7e81d closes https://github.com/official-stockfish/Stockfish/pull/5879 Bench: 2581469 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: Daniel Monroe
Date: Thu Feb 13 20:17:26 2025 +0100 Timestamp: 1739474246 Decrease lmr depth if static eval decreases a lot This tweak originally had some more conditions which have been simplified away. Passed STC LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 60064 W: 15797 L: 15439 D: 28828 Elo +2.07 Ptnml(0-2): 236, 7080, 15106, 7310, 300 https://tests.stockfishchess.org/tests/view/67a2af9cfedef70e42ac3325 Passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 76794 W: 19740 L: 19337 D: 37717 Elo +1.82 Ptnml(0-2): 61, 8327, 21236, 8694, 79 https://tests.stockfishchess.org/tests/view/67a2c904fedef70e42ac374d Passed Non-Regression VVLTC scaling check LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 29046 W: 7581 L: 7389 D: 14076 Elo +2.30 Ptnml(0-2): 2, 2557, 9213, 2749, 2 https://tests.stockfishchess.org/tests/view/67a54b591c4a3ea87241cb83 Passed simplification STC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 212448 W: 55244 L: 55217 D: 101987 Elo +0.04 Ptnml(0-2): 932, 25283, 53707, 25430, 872 https://tests.stockfishchess.org/tests/view/67aaacb02554387b116f698f Passed simplification LTC LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 185736 W: 47270 L: 47217 D: 91249 Elo +0.10 Ptnml(0-2): 141, 20568, 51394, 20627, 138 https://tests.stockfishchess.org/tests/view/67ab8efa133d55b1d3bc1397 closes https://github.com/official-stockfish/Stockfish/pull/5878 Bench: 2512420 see source |