| !! 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: sscg13
Date: Wed Feb 18 21:46:57 2026 +0100 Timestamp: 1771447617 Update NNUE architecture to SFNNv13 and net nn-5227780996d3.nnue Since the introduction of Threat Inputs in SFNNv10 and its refinements, the accumulator/L1 size has significantly decreased. This has made it more computationally favorable to double the L2 size from 16 to 32. Failed STC: LLR: -2.98 (-2.94,2.94) <0.00,2.00> Total: 189184 W: 49649 L: 49635 D: 89900 Elo +0.03 Ptnml(0-2): 881, 22479, 47812, 22585, 835 https://tests.stockfishchess.org/tests/view/69928ef7bfe62dc95a624d5c Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 37902 W: 9833 L: 9509 D: 18560 Elo +2.97 Ptnml(0-2): 35, 4074, 10408, 4400, 34 https://tests.stockfishchess.org/tests/view/69937936ff782f8eeef611e3 Passed VLTC SMP: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 20576 W: 5455 L: 5191 D: 9930 Elo +4.46 Ptnml(0-2): 6, 1837, 6338, 2101, 6 https://tests.stockfishchess.org/tests/view/6994df0586e4a32314116399 closes https://github.com/official-stockfish/Stockfish/pull/6619 bench: 2396996 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: Wed Feb 18 21:44:20 2026 +0100 Timestamp: 1771447460 Minor cleanups in bitboard.h closes https://github.com/official-stockfish/Stockfish/pull/6618 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: Wed Feb 18 21:40:01 2026 +0100 Timestamp: 1771447201 Don't process kings after #6609 https://github.com/official-stockfish/Stockfish/pull/6617 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: rn5f107s2
Date: Wed Feb 18 21:39:06 2026 +0100 Timestamp: 1771447146 Add en passant santization tests to the CI and pos is ok closes https://github.com/official-stockfish/Stockfish/pull/6615 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: Carlos Esparza
Date: Wed Feb 18 05:58:44 2026 +0100 Timestamp: 1771390724 speed up update_piece_threats after SFNNv12 with the removal of all king-related threats in SFNNv12 we can avoid some work in update_piece_threats STC for anematode's swan: https://tests.stockfishchess.org/tests/view/6986b920b0f3ca5200aaf80a LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 262880 W: 68379 L: 67747 D: 126754 Elo +0.84 Ptnml(0-2): 808, 29001, 71223, 29567, 841 STC of further speedups on top of swan: https://tests.stockfishchess.org/tests/view/698d7f8362a8f472da3a8a35 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 65920 W: 17126 L: 16781 D: 32013 Elo +1.82 Ptnml(0-2): 186, 7084, 18105, 7369, 216 closes https://github.com/official-stockfish/Stockfish/pull/6614 No functional change Co-Authored-By: Timothy Herchen <> 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: Wed Feb 18 05:54:55 2026 +0100 Timestamp: 1771390495 VVLTC tune Passed VVLTC with stc bounds: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 21424 W: 5638 L: 5387 D: 10399 Elo +4.07 Ptnml(0-2): 2, 1925, 6607, 2176, 2 https://tests.stockfishchess.org/tests/view/69938fbcff782f8eeef612a9 Passed VVLTC with ltc bounds: LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 33410 W: 8784 L: 8499 D: 16127 Elo +2.96 Ptnml(0-2): 5, 2968, 10474, 3253, 5 https://tests.stockfishchess.org/tests/view/69923ea872254723ef22c6fa Verify Elo loss at STC: LLR: -2.93 (-2.94,2.94) <-1.75,0.25> Total: 17504 W: 4420 L: 4704 D: 8380 Elo -5.64 Ptnml(0-2): 56, 2259, 4420, 1947, 70 https://tests.stockfishchess.org/tests/view/69946e4186e4a3231411625b closes https://github.com/official-stockfish/Stockfish/pull/6616 bench: 3074962 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: Fri Feb 13 07:22:36 2026 +0100 Timestamp: 1770963756 Simplify probCutDepth term Passed STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 139392 W: 36003 L: 35897 D: 67492 Elo +0.26 Ptnml(0-2): 451, 16383, 35911, 16511, 440 https://tests.stockfishchess.org/tests/view/697ebb4d5f56030af97b5aa5 Passed LTC LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 266934 W: 67822 L: 67851 D: 131261 Elo -0.04 Ptnml(0-2): 175, 29579, 73955, 29616, 142 https://tests.stockfishchess.org/tests/view/6980e5a26362aee5c8a55398 closes https://github.com/official-stockfish/Stockfish/pull/6607 Bench: 2515956 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: Fri Feb 13 07:15:35 2026 +0100 Timestamp: 1770963335 Simplify malus formula Passed non-regression STC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 51936 W: 13490 L: 13283 D: 25163 Elo +1.38 Ptnml(0-2): 161, 6128, 13184, 6333, 162 https://tests.stockfishchess.org/tests/view/698120e06362aee5c8a55412 Passed non-regression LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 233772 W: 59502 L: 59499 D: 114771 Elo +0.00 Ptnml(0-2): 144, 25753, 65086, 25762, 141 https://tests.stockfishchess.org/tests/view/69827426889c3a4c31c8db52 closes https://github.com/official-stockfish/Stockfish/pull/6606 bench 2739355 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: Daniel Monroe
Date: Fri Feb 13 07:12:04 2026 +0100 Timestamp: 1770963124 Simplify malus decay formula Passed non-regression STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 93600 W: 24165 L: 24007 D: 45428 Elo +0.59 Ptnml(0-2): 325, 11021, 23958, 11163, 333 https://tests.stockfishchess.org/tests/view/698121d46362aee5c8a55414 Passed non-regression LTC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 83232 W: 21236 L: 21077 D: 40919 Elo +0.66 Ptnml(0-2): 46, 9147, 23083, 9282, 58 https://tests.stockfishchess.org/tests/view/698336dc473df9d1d24a90e8 closes https://github.com/official-stockfish/Stockfish/pull/6600 Bench: 2666284 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: anematode
Date: Fri Feb 13 07:06:33 2026 +0100 Timestamp: 1770962793 avoid modify_and_replicate for first load We call modify_and_replicate in load_networks, but this is quite inefficient. closes https://github.com/official-stockfish/Stockfish/pull/6574 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: lemteay
Date: Fri Feb 13 07:03:17 2026 +0100 Timestamp: 1770962597 Add constexpr specifier back to conthist_bonuses Passed STC LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 60288 W: 15668 L: 15331 D: 29289 Elo +1.94 Ptnml(0-2): 159, 6490, 16532, 6781, 182 https://tests.stockfishchess.org/tests/view/698c835762a8f472da3a88e1 closes https://github.com/official-stockfish/Stockfish/pull/6611 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: Maxim Masiutin
Date: Fri Feb 13 07:01:15 2026 +0100 Timestamp: 1770962475 Prefetch threat weight rows during append_changed_indices Passed STC (first run): https://tests.stockfishchess.org/tests/view/698030ee6362aee5c8a552c7 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 120800 W: 31336 L: 30912 D: 58552 Elo +1.22 Ptnml(0-2): 330, 13084, 33172, 13460, 354 Passed LTC: https://tests.stockfishchess.org/tests/view/6983946d473df9d1d24a916d LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 86850 W: 22352 L: 21951 D: 42547 Elo +1.60 Ptnml(0-2): 45, 8506, 25934, 8883, 57 Passed STC SMP (after changes made after opening the PR): https://tests.stockfishchess.org/tests/view/6987b4c1b0f3ca5200aaf9da LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 84480 W: 21994 L: 21627 D: 40859 Elo +1.51 Ptnml(0-2): 98, 9378, 22932, 9723, 109 Passed STC (second run, as a sanity check made after changes made after opening the PR -- these changed, however, didn't change assembly code produced by the compiler): https://tests.stockfishchess.org/tests/view/6987ad21b0f3ca5200aaf9c9 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 132192 W: 34526 L: 34083 D: 63583 Elo +1.16 Ptnml(0-2): 421, 14511, 35759, 15014, 391 GCC maps __builtin_prefetch locality=1 to PREFETCHT2 instruction, targeting L2 cache. To make things clear, added template-based approach as suggested by Disservin. PREFETCHT2 should be the appropriate choice for the 78 MB threat weight table: avoids L1d pollution, parks data in L2 where it is promoted to L1d on actual load. With 200-500 cycle lead time from make_index, data has time to arrive in L2. suggestions by Disservin and anematode included closes https://github.com/official-stockfish/Stockfish/pull/6602 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: Joost VandeVondele
Date: Fri Feb 13 06:57:08 2026 +0100 Timestamp: 1770962228 Introduce timeout for wget/curl in net download ensures the download terminates after 5min, even if the server stalled. closes https://github.com/official-stockfish/Stockfish/pull/6608 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: sscg13
Date: Fri Feb 13 06:56:10 2026 +0100 Timestamp: 1770962170 Update NNUE architecture to SFNNv12 and net nn-7e1657811c6d.nnue This net is trained with https://github.com/sscg13/nettest/blob/no-king-attacker/threats.yaml. Passed non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 92640 W: 24371 L: 24209 D: 44060 Elo +0.61 Ptnml(0-2): 389, 11047, 23322, 11137, 425 https://tests.stockfishchess.org/tests/view/6986345fa259e26d2c32e9c5 Passed non-regression LTC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 198636 W: 50960 L: 50919 D: 96757 Elo +0.07 Ptnml(0-2): 176, 22218, 54511, 22215, 198 https://tests.stockfishchess.org/tests/view/6987ee29b0f3ca5200aafa51 closes https://github.com/official-stockfish/Stockfish/pull/6609 bench: 2465828 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: Daniel Monroe
Date: Sun Feb 8 15:22:29 2026 +0100 Timestamp: 1770560549 Simplify away main history default Passed non-regression STC LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 130752 W: 33725 L: 33605 D: 63422 Elo +0.32 Ptnml(0-2): 421, 15472, 33460, 15612, 411 https://tests.stockfishchess.org/tests/view/697eb9e35f56030af97b5a9e Passed non-regression LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 53352 W: 13697 L: 13509 D: 26146 Elo +1.22 Ptnml(0-2): 36, 5804, 14811, 5986, 39 https://tests.stockfishchess.org/tests/view/6980e5846362aee5c8a55396 closes https://github.com/official-stockfish/Stockfish/pull/6590 Bench: 2375860 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: Dieter Dobbelaere
Date: Sun Feb 8 15:22:21 2026 +0100 Timestamp: 1770560541 Replace FNV-1a hash by faster and better MurmurHash64A. Replace FNV-1a hash algorithm by public domain MurmurHash64A, by Austin Appleby, which is faster and has better hash properties. This is also the default hash algorithm of GNU C++ Standard Library. Startup time on a given system (with x86-64-avx2 binaries) reduces from 378ms to 332ms (46ms faster). Hashing of the largest data input (46.1MB) goes from 44.2ms to 6.2ms, so about 7x faster. No functional change closes https://github.com/official-stockfish/Stockfish/pull/6579 Bench: 2570943 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: lemteay
Date: Sun Feb 8 15:22:06 2026 +0100 Timestamp: 1770560526 Raise inline threshold for clang/llvm Passed STC: https://tests.stockfishchess.org/tests/view/696884a56d118e46e1731473 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 29952 W: 7843 L: 7549 D: 14560 Elo +3.41 Ptnml(0-2): 72, 3215, 8118, 3489, 82 .text area size: ``` master(eb5a65a): 455490 pr: 453250 ``` Bench (clang 21.1.8): ``` Result of 100 runs ================== base (...kfish-master) = 1719708 +/- 3473 test (./stockfish ) = 1770555 +/- 3284 diff = +50846 +/- 3949 speedup = +0.0296 P(speedup > 0) = 1.0000 CPU: 16 x AMD Ryzen 9 7945HX with Radeon Graphics Hyperthreading: on ``` closes https://github.com/official-stockfish/Stockfish/pull/6550 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: Sun Feb 8 15:22:06 2026 +0100 Timestamp: 1770560526 Simplify Triple Margin Formula Passed STC: LLR: 3.01 (-2.94,2.94) <-1.75,0.25> Total: 517472 W: 133271 L: 133575 D: 250626 Elo -0.20 Ptnml(0-2): 1628, 61366, 133032, 61102, 1608 https://tests.stockfishchess.org/tests/view/69590175d844c1ce7cc7e9a2 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 95430 W: 24242 L: 24098 D: 47090 Elo +0.52 Ptnml(0-2): 42, 10289, 26926, 10399, 59 https://tests.stockfishchess.org/tests/view/695f7f03ca95f52e4b85253c Passed VVLTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 58828 W: 15299 L: 15135 D: 28394 Elo +0.97 Ptnml(0-2): 4, 5277, 18687, 5443, 3 https://tests.stockfishchess.org/tests/view/6961686c8709a8d27c0383f6 closes https://github.com/official-stockfish/Stockfish/pull/6546 Bench: 2570943 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: Jakub Ciolek
Date: Sun Feb 8 15:22:06 2026 +0100 Timestamp: 1770560526 Remove prefetching in Position::do_null_move Passed non-regression STC, Hash=16: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 60704 W: 15709 L: 15522 D: 29473 Elo +1.07 Ptnml(0-2): 169, 6589, 16649, 6776, 169 https://tests.stockfishchess.org/tests/view/6963d381f6d2e8deff76918f Passed non-regression STC SMP, Hash=512: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 313512 W: 80151 L: 80231 D: 153130 Elo -0.09 Ptnml(0-2): 376, 35492, 85111, 35390, 387 https://tests.stockfishchess.org/tests/view/696e1684e5a70879bd3fe38f closes https://github.com/official-stockfish/Stockfish/pull/6545 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: ppigazzini
Date: Sun Feb 8 15:22:06 2026 +0100 Timestamp: 1770560526 feat(build): use lld for clang if available Also simplify the CI. closes https://github.com/official-stockfish/Stockfish/pull/6592 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 Feb 8 15:22:06 2026 +0100 Timestamp: 1770560526 Minor fixes for MSVC closes https://github.com/official-stockfish/Stockfish/pull/6596 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: Disservin
Date: Sun Feb 8 15:20:42 2026 +0100 Timestamp: 1770560442 Fix Strict Aliasing Violation Even though this failed with non regression bounds on fishtest, merging it as is to improve the current situation. Failed Non Regression: https://tests.stockfishchess.org/tests/view/6988814db0f3ca5200aafb50 LLR: -2.94 (-2.94,2.94) <-1.75,0.25> Total: 185792 W: 48109 L: 48565 D: 89118 Elo -0.85 Ptnml(0-2): 553, 21228, 49811, 20730, 574 Previously we had code similar to this ``` alignas(64) std::uint8_t foo[1024]; const auto* int_ptr = reinterpret_cast<const std::int32_t*>(foo); ``` Which is a strict aliasing violation once we dereference int_ptr, which invokes UB and causes newer gcc version to emit incorrect code. fixes https://github.com/official-stockfish/Stockfish/issues/6598 fixes https://github.com/official-stockfish/Stockfish/issues/4932 This violation was introduced in PR #3287 and merged in commit 23c385e. Due to aggressive compiler optimizations, users may need to include CXXFLAGS=-fno-strict-aliasing as a build argument to ensure a correctly functioning binary. Also thanks to @anematode for writing parts of this and realizing this strict aliasing violation. closes https://github.com/official-stockfish/Stockfish/pull/6599 Bench: 2668754 Co-Authored-By: Timothy Herchen <> 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: Wed Feb 4 18:26:28 2026 +0100 Timestamp: 1770225988 Update NNUE architecture to SFNNv11 and net nn-3dd094f3dfcf.nnue Removes threat features of the form piece -> king, thus saving 13MB of net space and approximately 0.8 threat feature updates per incremental accumulator update. Passed non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 33664 W: 8864 L: 8636 D: 16164 Elo +2.35 Ptnml(0-2): 136, 3926, 8501, 4112, 157 https://tests.stockfishchess.org/tests/view/6981dcda4776a4e6e7fef2ac Passed non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 46896 W: 12077 L: 11881 D: 22938 Elo +1.45 Ptnml(0-2): 41, 5118, 12924, 5334, 31 https://tests.stockfishchess.org/tests/view/69827c6beb87369ff4d0c7d5 closes https://github.com/official-stockfish/Stockfish/pull/6593 bench: 2668754 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: Pieter te Brake
Date: Wed Feb 4 18:22:07 2026 +0100 Timestamp: 1770225727 Update castling rights unconditionally. passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 163680 W: 42214 L: 42137 D: 79329 Elo +0.16 Ptnml(0-2): 454, 18054, 44734, 18157, 441 https://tests.stockfishchess.org/tests/view/697e6f4e5f56030af97b5a3c closes https://github.com/official-stockfish/Stockfish/pull/6588 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: Pieter te Brake
Date: Wed Feb 4 18:17:23 2026 +0100 Timestamp: 1770225443 Simplify en passant square update in Position::do_move(). Passed non-regression STC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 119680 W: 31011 L: 30884 D: 57785 Elo +0.37 Ptnml(0-2): 354, 13231, 32575, 13294, 386 https://tests.stockfishchess.org/tests/view/6973b06c6cd60a8e97ca62e5 closes https://github.com/official-stockfish/Stockfish/pull/6565 No functional change see source |