| 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: CSTENTOR
Date: Sat Aug 2 16:12:12 2025 +0200 Timestamp: 1754143932 Make Resetting the Aspiration Window after FailLow more aggressive Sets beta=(3alpha+beta)/4 when failLow. Before it was beta=(alpha+beta)/2, even though in theory we should be getting an upper bound from a failLow, we can’t trust the score that caused the failLow. Therefore beta=alpha doesn’t work. I made the buffer between the new beta to the bestValue that caused the failLow smaller. passed STC: https://tests.stockfishchess.org/tests/view/688674947b562f5f7b7315b5 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 119616 W: 31253 L: 30818 D: 57545 Elo +1.26 Ptnml(0-2): 313, 14028, 30724, 14397, 346 passed LTC: https://tests.stockfishchess.org/tests/view/6887e0ad7b562f5f7b731afc LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 96978 W: 24905 L: 24466 D: 47607 Elo +1.57 Ptnml(0-2): 59, 10376, 27183, 10809, 62 closes https://github.com/official-stockfish/Stockfish/pull/6197 bench: 3085519 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: aronpetkovski
Date: Sat Aug 2 16:02:41 2025 +0200 Timestamp: 1754143361 Only do IIR in minimally reduced nodes Passed STC LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 164256 W: 42799 L: 42299 D: 79158 Elo +1.06 Ptnml(0-2): 451, 19305, 42087, 19863, 422 https://tests.stockfishchess.org/tests/view/68868e9b7b562f5f7b731615 Passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 279396 W: 71871 L: 71062 D: 136463 Elo +1.01 Ptnml(0-2): 126, 30117, 78404, 30924, 127 https://tests.stockfishchess.org/tests/view/6886a4977b562f5f7b731663 closes https://github.com/official-stockfish/Stockfish/pull/6196 Bench: 3490609 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: J. Oster
Date: Sat Aug 2 15:54:10 2025 +0200 Timestamp: 1754142850 Display upper/lowerbound before wdl Bound info belongs directly to score info closes https://github.com/official-stockfish/Stockfish/pull/6195 No functional change. see source |
| Windows x64 for Haswell CPUs 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: MinetaS
Date: Sat Aug 2 15:52:24 2025 +0200 Timestamp: 1754142744 Increase CI timeouts for perft might fix CI failures on macOS instances closes https://github.com/official-stockfish/Stockfish/pull/6194 No functional change see source |
| 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: Sat Aug 2 15:50:17 2025 +0200 Timestamp: 1754142617 Re-adding ttHit condition, but this time in the inner block Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 150240 W: 39305 L: 38819 D: 72116 Elo +1.12 Ptnml(0-2): 536, 17541, 38494, 17999, 550 https://tests.stockfishchess.org/tests/view/6887ce577b562f5f7b731a85 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 159120 W: 41025 L: 40461 D: 77634 Elo +1.23 Ptnml(0-2): 96, 16974, 44866, 17518, 106 https://tests.stockfishchess.org/tests/view/6887f0ba7b562f5f7b731c5d closes https://github.com/official-stockfish/Stockfish/pull/6193 bench: 3498926 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: mstembera
Date: Sat Aug 2 15:49:35 2025 +0200 Timestamp: 1754142575 Optimize find_nnz() using VBMI2 about a 0.7% speedup for the x86-64-avx512icl ARCH closes https://github.com/official-stockfish/Stockfish/pull/6186 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: aronpetkovski
Date: Mon Jul 28 20:18:55 2025 +0200 Timestamp: 1753726735 Simplify LMR extension limit formula This patch simplifies the maximum depth formula that reductions in LMR can allow. Passed STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 35616 W: 9358 L: 9139 D: 17119 Elo +2.14 Ptnml(0-2): 101, 4051, 9278, 4284, 94 https://tests.stockfishchess.org/tests/view/688608cf966ed85face24882 Passed LTC LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 22284 W: 5833 L: 5613 D: 10838 Elo +3.43 Ptnml(0-2): 8, 2367, 6173, 2585, 9 https://tests.stockfishchess.org/tests/view/68860d7f966ed85face248d5 closes https://github.com/official-stockfish/Stockfish/pull/6191 Bench: 2902492 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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 Jul 28 20:13:15 2025 +0200 Timestamp: 1753726395 Simplify extra continuation history updates Passed simplification STC LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 254464 W: 65774 L: 65793 D: 122897 Elo -0.03 Ptnml(0-2): 699, 30087, 65638, 30150, 658 https://tests.stockfishchess.org/tests/view/68863283966ed85face24a59 Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 144750 W: 37111 L: 37018 D: 70621 Elo +0.22 Ptnml(0-2): 79, 15676, 40764, 15785, 71 https://tests.stockfishchess.org/tests/view/6886655f7b562f5f7b731359 closes https://github.com/official-stockfish/Stockfish/pull/6189 Bench: 3071078 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: Styx
Date: Mon Jul 28 20:11:40 2025 +0200 Timestamp: 1753726300 Simplify NMP condition As this is tried only for cutNode, and all children of cutNodes will be nonCutNodes, the guard condition is redundant. Simplification just removes the unnecessary condition (always true). closes https://github.com/official-stockfish/Stockfish/pull/6187 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: 87
Date: Mon Jul 28 20:05:26 2025 +0200 Timestamp: 1753725926 Remove unnecessary deque allocation in perft closes https://github.com/official-stockfish/Stockfish/pull/6182 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 Jul 28 20:03:05 2025 +0200 Timestamp: 1753725785 Simplify newDepth modification formulas Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 21856 W: 5709 L: 5471 D: 10676 Elo +3.78 Ptnml(0-2): 77, 2466, 5589, 2734, 62 https://tests.stockfishchess.org/tests/view/68862ea4966ed85face24a27 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 108828 W: 27893 L: 27763 D: 53172 Elo +0.42 Ptnml(0-2): 59, 11860, 30435, 12012, 48 https://tests.stockfishchess.org/tests/view/68863046966ed85face24a3b closes https://github.com/official-stockfish/Stockfish/pull/6181 Bench: 3069051 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 Jul 28 19:52:40 2025 +0200 Timestamp: 1753725160 increase futility value when capturing last moved piece Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 204320 W: 53059 L: 52500 D: 98761 Elo +0.95 Ptnml(0-2): 551, 23874, 52778, 24379, 578 https://tests.stockfishchess.org/tests/view/688618ae966ed85face24976 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 138582 W: 35748 L: 35225 D: 67609 Elo +1.31 Ptnml(0-2): 62, 14874, 38900, 15389, 66 https://tests.stockfishchess.org/tests/view/68862717966ed85face249f2 closes https://github.com/official-stockfish/Stockfish/pull/6190 Bench: 2894413 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 Jul 28 19:49:05 2025 +0200 Timestamp: 1753724945 Add depth condition Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 103360 W: 26941 L: 26530 D: 49889 Elo +1.38 Ptnml(0-2): 291, 11964, 26770, 12353, 302 https://tests.stockfishchess.org/tests/view/68863547966ed85face24a6f Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 115128 W: 29734 L: 29258 D: 56136 Elo +1.44 Ptnml(0-2): 48, 12406, 32182, 12878, 50 https://tests.stockfishchess.org/tests/view/68864f867b562f5f7b7312f2 closes https://github.com/official-stockfish/Stockfish/pull/6184 Bench: 2972498 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: Mon Jul 28 19:45:13 2025 +0200 Timestamp: 1753724713 Tweak the logic for setting the improving flag Tweak the logic for setting the improving flag when the static evaluation is significantly higher than alpha. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 92320 W: 24057 L: 23664 D: 44599 Elo +1.48 Ptnml(0-2): 247, 10689, 23893, 11086, 245 https://tests.stockfishchess.org/tests/view/68860aba966ed85face248a1 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 281292 W: 72496 L: 71683 D: 137113 Elo +1.00 Ptnml(0-2): 135, 30289, 78995, 31082, 145 https://tests.stockfishchess.org/tests/view/6886168c966ed85face24962 closes https://github.com/official-stockfish/Stockfish/pull/6180 Bench: 3200439 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: Mon Jul 28 19:40:15 2025 +0200 Timestamp: 1753724415 Simplify static evaluation difference to move ordering logic Passed STC simplification bounds https://tests.stockfishchess.org/tests/view/686fcb091451bd6fb83082bc LLR: 2.92 (-2.94,2.94) <-1.75,0.25> Total: 762816 W: 196717 L: 197295 D: 368804 Elo -0.26 Ptnml(0-2): 2052, 90457, 196853, 90109, 1937 Passed LTC simplification bounds https://tests.stockfishchess.org/tests/view/68808d316e17e7fa3939b35d LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 44736 W: 11499 L: 11303 D: 21934 Elo +1.52 Ptnml(0-2): 24, 4766, 12586, 4974, 18 closes https://github.com/official-stockfish/Stockfish/pull/6176 bench: 2684407 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: Guenther Demetz
Date: Mon Jul 28 19:35:28 2025 +0200 Timestamp: 1753724128 Simplify search functions according DRY principle Passed STC non-regression bounds https://tests.stockfishchess.org/tests/view/6870db4bfa93cf16d3bb286a LLR: 3.00 (-2.94,2.94) <-1.75,0.25> Total: 182016 W: 46735 L: 46673 D: 88608 Elo +0.12 Ptnml(0-2): 368, 19895, 50465, 19867, 413 closes https://github.com/official-stockfish/Stockfish/pull/6161 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: Muzhen Gaming
Date: Mon Jul 28 19:33:00 2025 +0200 Timestamp: 1753723980 VVLTC Search Tune alues were tuned with 125k VVLTC games. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/68865feb7b562f5f7b731341 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 39640 W: 10380 L: 10109 D: 19151 Elo +2.38 Ptnml(0-2): 5, 3556, 12424, 3833, 2 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/68864dfa7b562f5f7b7312ee LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 25972 W: 6807 L: 6537 D: 12628 Elo +3.61 Ptnml(0-2): 0, 2294, 8132, 2556, 4 closes https://github.com/official-stockfish/Stockfish/pull/6188 Bench: 3143696 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: aronpetkovski
Date: Thu Jul 24 10:38:13 2025 +0200 Timestamp: 1753346293 Simplify eval >= beta condition from NMP It seems that now only checking if static eval is above beta by some margin is all that's necessary. Passed Non-Regression STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 227264 W: 58430 L: 58421 D: 110413 Elo +0.01 Ptnml(0-2): 532, 26559, 59454, 26542, 545 https://tests.stockfishchess.org/tests/view/68763a77432ca24f6388c766 Passed Non-Regression LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 72048 W: 18622 L: 18455 D: 34971 Elo +0.81 Ptnml(0-2): 26, 7775, 20272, 7908, 43 https://tests.stockfishchess.org/tests/view/687c9f2b6e17e7fa3939b0c5 closes https://github.com/official-stockfish/Stockfish/pull/6175 Bench: 2759840 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: Daniel Monroe
Date: Thu Jul 24 10:32:41 2025 +0200 Timestamp: 1753345961 Simplify away a term in see pruning This change only sets the margin to 0 when depth <= 2 and margin <= 42 which never has a difference, thus non-functional Passed non-regression STC LLR: 3.51 (-2.94,2.94) <-1.75,0.25> Total: 306976 W: 78935 L: 78961 D: 149080 Elo -0.03 Ptnml(0-2): 630, 34097, 84067, 34057, 637 https://tests.stockfishchess.org/tests/view/68708015fa93cf16d3bb2782 closes https://github.com/official-stockfish/Stockfish/pull/6170 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: Disservin
Date: Thu Jul 24 10:28:17 2025 +0200 Timestamp: 1753345697 Prevent accidential misuse of TUNE() Writing a TUNE expression like int smallNetThreshold = 962; TUNE(smallNetThreshold, 850, 1050); is wrong and can lead to a weird binary. It should thus fail to even compile, with the proper intellisense you'll also see the error directly in your editor. A cheap way to prevent this is to disallow any fundamental type in the parameter list. closes https://github.com/official-stockfish/Stockfish/pull/6164 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 Jul 24 10:26:15 2025 +0200 Timestamp: 1753345575 Correct comment closes https://github.com/official-stockfish/Stockfish/pull/6159 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: Daniel Samek
Date: Thu Jul 24 10:24:08 2025 +0200 Timestamp: 1753345448 Add offsets to history updates. All parameters were tuned on 60k STC games (https://tests.stockfishchess.org/tests/view/6867ef49fe0f2fe354c0c735). Passed STC: LLR: 2.98 (-2.94,2.94) <0.00,2.00> Total: 60576 W: 15794 L: 15444 D: 29338 Elo +2.01 Ptnml(0-2): 141, 7003, 15642, 7369, 133 https://tests.stockfishchess.org/tests/view/686d5af11451bd6fb830772a Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 58722 W: 15159 L: 14799 D: 28764 Elo +2.13 Ptnml(0-2): 19, 6259, 16455, 6599, 29 https://tests.stockfishchess.org/tests/view/686f9fd51451bd6fb83081c9 closes https://github.com/official-stockfish/Stockfish/pull/6158 bench: 2706299 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: FauziAkram
Date: Thu Jul 24 10:19:10 2025 +0200 Timestamp: 1753345150 Remove !ttData.move condition from cutNode reduction Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 118080 W: 30427 L: 30298 D: 57355 Elo +0.38 Ptnml(0-2): 290, 13880, 30561, 14029, 280 https://tests.stockfishchess.org/tests/view/6853f9bc038630d25f468670 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 232272 W: 59187 L: 59182 D: 113903 Elo +0.01 Ptnml(0-2): 111, 25430, 65014, 25505, 76 https://tests.stockfishchess.org/tests/view/68585c40a596a06817bb922e closes https://github.com/official-stockfish/Stockfish/pull/6157 bench: 2227361 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: Shawn Xu
Date: Thu Jul 24 10:13:24 2025 +0200 Timestamp: 1753344804 Consistent syntax for class members Currently, search.cpp uses three different syntax when accessing class member variables * thisThread object references. This was a remnant from when pos.this_thread() was necessary for thread-local variable access * this object references * implicit member variable access This PR aims to deprecate thisThread and standardize this syntax to implicit variable access, which is consistent with the rest of SF's codebase. closes https://github.com/official-stockfish/Stockfish/pull/6154 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: 87
Date: Thu Jul 24 10:08:35 2025 +0200 Timestamp: 1753344515 Speedup movegen with VBMI2 Passed STC LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 166720 W: 43191 L: 42701 D: 80828 Elo +1.02 Ptnml(0-2): 348, 18567, 45069, 18999, 377 https://tests.stockfishchess.org/tests/view/686ae98dfe0f2fe354c0c867 Refactor movegen to emit to a vector with 16-bit elements, which enables a speedup with AVX512-VBMI2 when writing moves to the move list. Very crude timing measurements of perft via timing ./stockfish "go perft 7" demonstrates approximately 17% perft speedup: Summary ./Stockfish-dev/src/stockfish 'go perft 7' ran 1.17 ± 0.04 times faster than ./Stockfish-base/src/stockfish 'go perft 7' Estimated overall nps increase of 0.4% via speedtest: 33605229 -> 33749825 (many thanks JonathanHallstrom). The corresponding arch is avx512icl as it is a good baseline for consumer avx-512 feature set support; Intel Ice Lake was the first consumer AVX-512 CPU and it is a decent subset of what AMD Zen 4 supports. closes https://github.com/official-stockfish/Stockfish/pull/6153 No functional change see source |