| 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: Mon Jul 24 01:56:20 2023 +0200 Timestamp: 1690156580 Check clock more often This patch changes the frequency with which the time is checked, changing frequency from every 1024 counted nodes to every 512 counted nodes. The master value was tuned for the old classical eval, the patch takes the roughly 2x slowdown in nps with SFNNUEv7 into account. This could reduce a bit the losses on time on fishtest, but they are probably unrelated. passed STC: https://tests.stockfishchess.org/tests/view/64bb8ae5dc56e1650abb1b11 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 76576 W: 19677 L: 19501 D: 37398 Elo +0.80 Ptnml(0-2): 274, 8592, 20396, 8736, 290 closes https://github.com/official-stockfish/Stockfish/pull/4704 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: Michael Chaly
Date: Wed Jul 19 21:40:38 2023 +0200 Timestamp: 1689795638 Do more futility pruning for cutNodes that are not in TT This is somewhat similar to IIR for cutnodes but instead of reducing depth for cutnodes that don't have tt move we reduce margin multiplier in futility pruning for cutnodes that are not in TT. Passed STC: https://tests.stockfishchess.org/tests/view/64b244b90cdec37b95734c5b LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 75552 W: 19404 L: 19029 D: 37119 Elo +1.72 Ptnml(0-2): 233, 8806, 19378, 9071, 288 Passed LTC: https://tests.stockfishchess.org/tests/view/64b3ae5a0cdec37b95736516 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 104988 W: 27152 L: 26697 D: 51139 Elo +1.51 Ptnml(0-2): 41, 11259, 29446, 11700, 48 closes https://github.com/official-stockfish/Stockfish/pull/4700 bench 1727577 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 Jul 19 21:39:51 2023 +0200 Timestamp: 1689795591 Remove inline assembly closes https://github.com/official-stockfish/Stockfish/pull/4698 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: Cody Ho
Date: Wed Jul 19 21:38:39 2023 +0200 Timestamp: 1689795519 Unused code cleanup closes https://github.com/official-stockfish/Stockfish/pull/4696 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: Jorge
Date: Wed Jul 19 21:36:38 2023 +0200 Timestamp: 1689795398 Add CodeQL workflow add CI tooling to detect security bugs. closes https://github.com/official-stockfish/Stockfish/pull/4659 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: rn5f107s2
Date: Tue Jul 18 08:10:11 2023 +0200 Timestamp: 1689660611 Removes a few Bitboards and functions No longer used closes https://github.com/official-stockfish/Stockfish/pull/4695 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: Robert Nurnberg @ elitebook
Date: Tue Jul 18 08:09:52 2023 +0200 Timestamp: 1689660592 remove evalType from bench no longer used closes https://github.com/official-stockfish/Stockfish/pull/4694 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 Jul 16 22:27:13 2023 +0200 Timestamp: 1689539233 Switch to macos 13 for CI allows for building x86-64-avx2 and x86-64-bmi2 binaries for mac install coreutils show hardware capabilities as seen by the compilers move some tests from sse41 to avx2 as platforms support it closes https://github.com/official-stockfish/Stockfish/pull/4692 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 Jul 16 17:47:25 2023 +0200 Timestamp: 1689522445 Deprecate the x86-64-modern arch Explicitly describe the architecture as deprecated, it remains available as its current alias x86-64-sse41-popcnt CPUs that support just this instruction set are now years old, any few years old Intel or AMD CPU supports x86-64-avx2. However, naming things 'modern' doesn't age well, so instead use explicit names. Adjust CI accordingly. Wiki, fishtest, downloader done as well. closes https://github.com/official-stockfish/Stockfish/pull/4691 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: Michael Chaly
Date: Sun Jul 16 15:18:41 2023 +0200 Timestamp: 1689513521 Remove improvement variable No longer used in a meaningful way. Improve comments. Closes https://github.com/official-stockfish/Stockfish/pull/4688 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
Date: Sun Jul 16 15:16:14 2023 +0200 Timestamp: 1689513374 Remove pawnKey from StateInfo Remove pawnKey since it is not used anymore. Passed Non-regression STC: https://tests.stockfishchess.org/tests/view/64b023110cdec37b9573265c LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 334848 W: 85440 L: 85545 D: 163863 Elo -0.11 Ptnml(0-2): 1134, 38101, 89075, 37964, 1150 closes https://github.com/official-stockfish/Stockfish/pull/4687 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 Jul 16 15:14:50 2023 +0200 Timestamp: 1689513290 Consolidate to centipawns conversion avoid doing this calculations in multiple places. closes https://github.com/official-stockfish/Stockfish/pull/4686 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 Jul 16 15:13:24 2023 +0200 Timestamp: 1689513204 Remove some CI parts not yet working downgrading compiler didn't work for windows build. Stick to gcc 13 for now. Windows x86-32 not a 32bit binary, remove. closes https://github.com/official-stockfish/Stockfish/pull/4685 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: AndrovT
Date: Sun Jul 16 15:12:21 2023 +0200 Timestamp: 1689513141 remove large input specialization Removes unused large input specialization for dense affine transform. It has been obsolete since #4612 was merged. closes https://github.com/official-stockfish/Stockfish/pull/4684 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: Sat Jul 15 09:16:09 2023 +0200 Timestamp: 1689405369 Reintroduce nnue eval pawn count multipliers again With separate multipliers for nnue eval and optimism scaling. This patch used 4 out of 7 params tuned with spsa at 30+0.3 using this tuning config: Value LazyThreshold1 = Value(3622); Value LazyThreshold2 = Value(1962); int psqThresh = 2048; int nnueNpmBase = 945; int nnuePcMult = 0; int optNpmBase = 150; int optPcMult = 0; TUNE(SetRange(3322, 3922), LazyThreshold1); TUNE(SetRange(1662, 2262), LazyThreshold2); TUNE(SetRange(1748, 2348), psqThresh); TUNE(SetRange(745, 1145), nnueNpmBase); TUNE(SetRange(-16, 16), nnuePcMult); TUNE(SetRange(0, 300), optNpmBase); TUNE(SetRange(-16, 16), optPcMult); Passed STC: https://tests.stockfishchess.org/tests/view/64a5a9b402cd07745c60ed07 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 173632 W: 44417 L: 43903 D: 85312 Elo +1.03 Ptnml(0-2): 547, 20025, 45068, 20719, 457 Passed LTC: https://tests.stockfishchess.org/tests/view/64a972a302cd07745c6136af LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 277644 W: 70955 L: 70147 D: 136542 Elo +1.01 Ptnml(0-2): 193, 29902, 77787, 30784, 156 closes https://github.com/official-stockfish/Stockfish/pull/4681 bench 1556301 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: Sat Jul 15 09:15:16 2023 +0200 Timestamp: 1689405316 Build and test more binaries in CI use a fixed compiler on Linux and Windows (right now gcc 11). build avxvnni on Windows (Linux needs updated core utils) build x86-32 on Linux (Windows needs other mingw) fix a Makefile issue where a failed PGOBENCH would not stop the build reuse the WINE_PATH for SDE as we do for QEMU use WINE_PATH variable also for the signature verify the bench for each of the binaries do not build x86-64-avx2 on macos closes https://github.com/official-stockfish/Stockfish/pull/4682 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 Jul 15 09:13:02 2023 +0200 Timestamp: 1689405182 Use more expressive names for bonus1 and bonus2 closes https://github.com/official-stockfish/Stockfish/pull/4683 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: Thu Jul 13 08:21:17 2023 +0200 Timestamp: 1689229277 Generate binaries for more advanced architectures use intel's Software Development Emulator (SDE) in the actions that build the binaries. This allows for building on Windows and Linux binaries for - x86-64-avx512 - x86-64-vnni256 - x86-64-vnni512 (x86-64-avxvnni needs more recent gcc in the actions) also build x86-64-avx2 on macos. closes https://github.com/official-stockfish/Stockfish/pull/4679 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: Thu Jul 13 08:20:33 2023 +0200 Timestamp: 1689229233 More simplifications and cleanup in affine_transform_sparse_input.h closes https://github.com/official-stockfish/Stockfish/pull/4677 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: Sebastian Buchwald
Date: Thu Jul 13 08:19:37 2023 +0200 Timestamp: 1689229177 Cleanup code after removal of classical evaluation This includes the following changes: - Remove declaration of removed global variable - Adapt string that mentions removed UCI option closes https://github.com/official-stockfish/Stockfish/pull/4675 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: Tue Jul 11 22:56:49 2023 +0200 Timestamp: 1689109009 Remove classical evaluation since the introduction of NNUE (first released with Stockfish 12), we have maintained the classical evaluation as part of SF in frozen form. The idea that this code could lead to further inputs to the NN or search did not materialize. Now, after five releases, this PR removes the classical evaluation from SF. Even though this evaluation is probably the best of its class, it has become unimportant for the engine's strength, and there is little need to maintain this code (roughly 25% of SF) going forward, or to expend resources on trying to improve its integration in the NNUE eval. Indeed, it had still a very limited use in the current SF, namely for the evaluation of positions that are nearly decided based on material difference, where the speed of the classical evaluation outweights its inaccuracies. This impact on strength is small, roughly 2Elo, and probably decreasing in importance as the TC grows. Potentially, removal of this code could lead to the development of techniques to have faster, but less accurate NN evaluation, for certain positions. STC https://tests.stockfishchess.org/tests/view/64a320173ee09aa549c52157 Elo: -2.35 ± 1.1 (95%) LOS: 0.0% Total: 100000 W: 24916 L: 25592 D: 49492 Elo -2.35 Ptnml(0-2): 287, 12123, 25841, 11477, 272 nElo: -4.62 ± 2.2 (95%) PairsRatio: 0.95 LTC https://tests.stockfishchess.org/tests/view/64a320293ee09aa549c5215b Elo: -1.74 ± 1.0 (95%) LOS: 0.0% Total: 100000 W: 25010 L: 25512 D: 49478 Elo -1.74 Ptnml(0-2): 44, 11069, 28270, 10579, 38 nElo: -3.72 ± 2.2 (95%) PairsRatio: 0.96 VLTC SMP https://tests.stockfishchess.org/tests/view/64a3207c3ee09aa549c52168 Elo: -1.70 ± 0.9 (95%) LOS: 0.0% Total: 100000 W: 25673 L: 26162 D: 48165 Elo -1.70 Ptnml(0-2): 8, 9455, 31569, 8954, 14 nElo: -3.95 ± 2.2 (95%) PairsRatio: 0.95 closes https://github.com/official-stockfish/Stockfish/pull/4674 Bench: 1444646 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 Jul 11 22:55:00 2023 +0200 Timestamp: 1689108900 Simplify PvNode reduction Simplification STC: https://tests.stockfishchess.org/tests/view/64a415803ee09aa549c539c3 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 37856 W: 9719 L: 9504 D: 18633 Elo +1.97 Ptnml(0-2): 98, 4277, 9977, 4464, 112 Simplification LTC: https://tests.stockfishchess.org/tests/view/64a5ffe202cd07745c60f360 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 55878 W: 14323 L: 14138 D: 27417 Elo +1.15 Ptnml(0-2): 21, 5993, 15732, 6166, 27 closes https://github.com/official-stockfish/Stockfish/pull/4673 Bench: 2604965 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: Tue Jul 11 22:53:15 2023 +0200 Timestamp: 1689108795 Fix CI output closes https://github.com/official-stockfish/Stockfish/pull/4669 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: Thu Jul 6 23:03:58 2023 +0200 Timestamp: 1688677438 Update default net to nn-c38c3d8d3920.nnue This was a later epoch from the same experiment that led to the previous master net. After training, it was prepared the same way: 1. greedy permuting L1 weights with https://github.com/official-stockfish/Stockfish/pull/4620 2. leb128 compression with https://github.com/glinscott/nnue-pytorch/pull/251 3. greedy 2- and 3- cycle permuting with https://github.com/official-stockfish/Stockfish/pull/4640 Local elo at 25k nodes per move (vs. L1-1536 nn-fdc1d0fe6455.nnue): nn-epoch739.nnue : 20.2 +/- 1.7 Passed STC: https://tests.stockfishchess.org/tests/view/64a050b33ee09aa549c4e4c8 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 195552 W: 49977 L: 49430 D: 96145 Elo +0.97 Ptnml(0-2): 556, 22775, 50607, 23242, 596 Passed LTC: https://tests.stockfishchess.org/tests/view/64a127bd3ee09aa549c4f60c LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 235452 W: 60327 L: 59609 D: 115516 Elo +1.06 Ptnml(0-2): 119, 25173, 66426, 25887, 121 closes https://github.com/official-stockfish/Stockfish/pull/4666 bench 2427629 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: Thu Jul 6 23:03:16 2023 +0200 Timestamp: 1688677396 Add armv8-dotprod to CI binaries also generate binaries for more recent Android hardware. closes https://github.com/official-stockfish/Stockfish/pull/4663 No functional change see source |