| 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: Thu Jun 2 07:43:14 2022 +0200 Timestamp: 1654148594 Add info about elo gained from some heuristics Add info about qsearch and impact of main and continuation histories. Based on these tests: https://tests.stockfishchess.org/tests/view/62946ffcb0d5a7d1b780fc7e https://tests.stockfishchess.org/tests/view/628facb71e7cd5f299669534 https://tests.stockfishchess.org/tests/view/628eade11e7cd5f299666f2e closes https://github.com/official-stockfish/Stockfish/pull/4041 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: xoto10
Date: Sun May 29 19:14:20 2022 +0200 Timestamp: 1653844460 Adjust scale param higher xoto10's scaleopt tune resulted in a yellow LTC, but the main parameter shift looked almost exactly like the tune rate reduction schedule, so further increases of that param were tried. Joint work xoto10 and dubslow. passed LTC: https://tests.stockfishchess.org/tests/view/628c709372775f382300f03e LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 70112 W: 18932 L: 18584 D: 32596 Elo +1.72 Ptnml(0-2): 66, 6904, 20757, 7274, 55 failed STC: https://tests.stockfishchess.org/tests/view/6290e4441e7cd5f29966bdc8 LLR: -2.96 (-2.94,2.94) <0.00,2.50> Total: 59976 W: 15919 L: 16018 D: 28039 Elo -0.57 Ptnml(0-2): 250, 6791, 15974, 6754, 219 similar LTC's were yellow first yellow LTC: https://tests.stockfishchess.org/tests/view/6288a33f817227d3e5c5b05d double exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e140372775f38230129a6 triple exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e2caf72775f3823012d45 closes https://github.com/official-stockfish/Stockfish/pull/4036 bench 6410652 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: proukornew
Date: Sun May 29 19:04:25 2022 +0200 Timestamp: 1653843865 Improve handling of variables set in the make environment removes duplication on the commandline for example in a profile-build closes https://github.com/official-stockfish/Stockfish/pull/3859 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: Giacomo Lorenzetti
Date: Sun May 29 18:54:19 2022 +0200 Timestamp: 1653843259 Small speedup in futility_move_count The speedup is around 0.25% using gcc 11.3.1 (bmi2, nnue bench, depth 16 and 23) while it is neutral using clang (same conditions). According to `perf` that integer division was one of the most time-consuming instructions in search (gcc disassembly). Passed STC: https://tests.stockfishchess.org/tests/view/628a17fe24a074e5cd59b3aa LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 22232 W: 5992 L: 5751 D: 10489 Elo +3.77 Ptnml(0-2): 88, 2235, 6218, 2498, 77 yellow LTC: https://tests.stockfishchess.org/tests/view/628a35d7ccae0450e35106f7 LLR: -2.95 (-2.94,2.94) <0.50,3.00> Total: 320168 W: 85853 L: 85326 D: 148989 Elo +0.57 Ptnml(0-2): 185, 29698, 99821, 30165, 215 This patch also suggests that UHO STC is sensible to small speedups (< 0.50%). closes https://github.com/official-stockfish/Stockfish/pull/4032 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 May 29 18:46:35 2022 +0200 Timestamp: 1653842795 Add command line flags to link to information This patch provides command line flags `--help` and `--license` as well as the corresponding `help` and `license` commands. ``` $ ./stockfish --help Stockfish 200522 by the Stockfish developers (see AUTHORS file) Stockfish is a powerful chess engine and free software licensed under the GNU GPLv3. Stockfish is normally used with a separate graphical user interface (GUI). Stockfish implements the universal chess interface (UCI) to exchange information. For further information see https://github.com/official-stockfish/Stockfish#readme or the corresponding README.md and Copying.txt files distributed with this program. ``` The idea is to provide a minimal help that links to the README.md file, not replicating information that is already available elsewhere. We use this opportunity to explicitly report the license as well. closes https://github.com/official-stockfish/Stockfish/pull/4027 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: Giacomo Lorenzetti
Date: Sun May 29 18:42:48 2022 +0200 Timestamp: 1653842568 Assorted small cleanups closes https://github.com/official-stockfish/Stockfish/pull/3973 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: candirufish
Date: Sat May 21 12:42:33 2022 +0200 Timestamp: 1653129753 Simplify a condition Principal variation depth late move reduction extension simplification. stc: https://tests.stockfishchess.org/tests/view/6285a1d19d18a78568e7fa24 LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 428536 W: 113433 L: 113851 D: 201252 Elo -0.34 Ptnml(0-2): 1671, 48606, 114090, 48272, 1629 ltc: https://tests.stockfishchess.org/tests/view/62871d20375cdc5de8cf5db3 LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 56792 W: 15123 L: 15011 D: 26658 Elo +0.69 Ptnml(0-2): 42, 5681, 16825, 5819, 29 closes https://github.com/official-stockfish/Stockfish/pull/4028 bench: 6501437 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: xoto10
Date: Sun May 15 20:20:37 2022 +0200 Timestamp: 1652638837 Tune scale and optimism. Tune scale and optimism in effort to make stockfish play more aggressively. STC @ 10+0.1 th 1: LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 27896 W: 7506 L: 7248 D: 13142 Elo +3.21 Ptnml(0-2): 103, 3047, 7388, 3309, 101 https://tests.stockfishchess.org/tests/live_elo/627fd0cfab44257388ab1f13 LTC @ 60+0.6 th 1: LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 65576 W: 17512 L: 17178 D: 30886 Elo +1.77 Ptnml(0-2): 37, 6397, 19587, 6729, 38 https://tests.stockfishchess.org/tests/live_elo/627ff666ab44257388ab256d closes https://github.com/official-stockfish/Stockfish/pull/4025 Bench 6407734 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: Sat May 14 13:17:35 2022 +0200 Timestamp: 1652527055 SE depth scaling using the previous depth This patch makes the SE depth condition more robust and allows it to scale with completed depth from a previous search. At long TC this patch is almost equivalent to https://github.com/official-stockfish/Stockfish/pull/4016 which had VLTC: https://tests.stockfishchess.org/tests/view/626abd7e8707aa698c0093a8 Elo: 2.35 +-1.5 (95%) LOS: 99.9% Total: 40000 W: 10991 L: 10720 D: 18289 Elo +2.35 Ptnml(0-2): 8, 3534, 12648, 3799, 11 nElo: 5.47 +-3.4 (95%) PairsRatio: 1.08 VLTC multicore: https://tests.stockfishchess.org/tests/view/6272a6afc8f14123163c1997 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 86808 W: 24165 L: 23814 D: 38829 Elo +1.40 Ptnml(0-2): 11, 7253, 28524, 7606, 10 however, it is now also gaining at LTC: LTC: https://tests.stockfishchess.org/tests/view/627e7cb523c0c72a05b651a9 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 27064 W: 7285 L: 7046 D: 12733 Elo +3.07 Ptnml(0-2): 8, 2446, 8390, 2675, 13 and should have nearly no influence at STC as depth 27 is rarely reached. It was noticed that initializing the threshold with MAX_PLY, had an adverse effect, possibly because the first move is sensitive to this. closes https://github.com/official-stockfish/Stockfish/pull/4021 closes https://github.com/official-stockfish/Stockfish/pull/4016 Bench: 6481017 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: Tomasz Sobczyk
Date: Sat May 14 12:47:22 2022 +0200 Timestamp: 1652525242 Update NNUE architecture to SFNNv5. Update network to nn-3c0aa92af1da.nnue. Architecture changes: Duplicated activation after the 1024->15 layer with squared crelu (so 15->15*2). As proposed by vondele. Trainer changes: Added bias to L1 factorization, which was previously missing (no measurable improvement but at least neutral in principle) For retraining linearly reduce lambda parameter from 1.0 at epoch 0 to 0.75 at epoch 800. reduce max_skipping_rate from 15 to 10 (compared to vondele's outstanding PR) Note: This network was trained with a ~0.8% error in quantization regarding the newly added activation function. This will be fixed in the released trainer version. Expect a trainer PR tomorrow. Note: The inference implementation cuts a corner to merge results from two activation functions. This could possibly be resolved nicer in the future. AVX2 implementation likely not necessary, but NEON is missing. First training session invocation: python3 train.py \ ../nnue-pytorch-training/data/nodes5000pv2_UHO.binpack \ ../nnue-pytorch-training/data/nodes5000pv2_UHO.binpack \ --gpus "$3," \ --threads 4 \ --num-workers 8 \ --batch-size 16384 \ --progress_bar_refresh_rate 20 \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --lambda=1.0 \ --max_epochs=400 \ --default_root_dir ../nnue-pytorch-training/experiment_$1/run_$2 Second training session invocation: python3 train.py \ ../nnue-pytorch-training/data/T60T70wIsRightFarseerT60T74T75T76.binpack \ ../nnue-pytorch-training/data/T60T70wIsRightFarseerT60T74T75T76.binpack \ --gpus "$3," \ --threads 4 \ --num-workers 8 \ --batch-size 16384 \ --progress_bar_refresh_rate 20 \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --start-lambda=1.0 \ --end-lambda=0.75 \ --gamma=0.995 \ --lr=4.375e-4 \ --max_epochs=800 \ --resume-from-model /data/sopel/nnue/nnue-pytorch-training/data/exp367/nn-exp367-run3-epoch399.pt \ --default_root_dir ../nnue-pytorch-training/experiment_$1/run_$2 Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.50> Total: 27288 W: 7445 L: 7178 D: 12665 Elo +3.40 Ptnml(0-2): 159, 3002, 7054, 3271, 158 https://tests.stockfishchess.org/tests/view/627e8c001919125939623644 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 21792 W: 5969 L: 5727 D: 10096 Elo +3.86 Ptnml(0-2): 25, 2152, 6294, 2406, 19 https://tests.stockfishchess.org/tests/view/627f2a855734b18b2e2ece47 closes https://github.com/official-stockfish/Stockfish/pull/4020 Bench: 6481017 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: Wed May 4 07:47:56 2022 +0200 Timestamp: 1651643276 Reduce depth after score improvement at PV nodes STC: LLR: 2.95 (-2.94,2.94) <0.00,2.50> Total: 73760 W: 19590 L: 19244 D: 34926 Elo +1.63 Ptnml(0-2): 285, 8352, 19292, 8634, 317 https://tests.stockfishchess.org/tests/view/626eb2dc9116b52aa83b73da LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 114400 W: 30561 L: 30111 D: 53728 Elo +1.37 Ptnml(0-2): 68, 11432, 33785, 11812, 103 https://tests.stockfishchess.org/tests/view/626f730859e9c431e0b10b21 closes https://github.com/official-stockfish/Stockfish/pull/4008 bench: 6174823 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: Tue May 3 17:58:01 2022 +0200 Timestamp: 1651593481 Use fail high count for LMR Increase reduction if next ply has a lot of fail high else reset count to 0 Passed STC: https://tests.stockfishchess.org/tests/view/626ea8299116b52aa83b71f6 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 144288 W: 38377 L: 37902 D: 68009 Elo +1.14 Ptnml(0-2): 565, 16298, 38054, 16551, 676 Passed LTC: https://tests.stockfishchess.org/tests/view/626fa0fb79f761bab2e382f0 LLR: 2.98 (-2.94,2.94) <0.50,3.00> Total: 74872 W: 20050 L: 19686 D: 35136 Elo +1.69 Ptnml(0-2): 51, 7541, 21893, 7895, 56 closes https://github.com/official-stockfish/Stockfish/pull/4006 bench: 7084802 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: Tue May 3 17:54:23 2022 +0200 Timestamp: 1651593263 Simplify time management. Replace the best move instability adjustment factor by a simpler version which doesn't have a dependency on the iteration depth. STC: LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 30800 W: 8232 L: 8073 D: 14495 Elo +1.79 Ptnml(0-2): 101, 3309, 8444, 3422, 124 https://tests.stockfishchess.org/tests/view/6266c77bc5b924ba22908d30 LTC: LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 61664 W: 16375 L: 16272 D: 29017 Elo +0.58 Ptnml(0-2): 40, 5869, 18897, 6000, 26 https://tests.stockfishchess.org/tests/view/6266fc39b3d1812808915f23 closes https://github.com/official-stockfish/Stockfish/pull/3999 Bench: 7729968 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: Fri Apr 22 08:17:22 2022 +0200 Timestamp: 1650608242 Negative extension for ttMove that is less than alpha and value in the context of singular extensions Passed STC: https://tests.stockfishchess.org/tests/view/626047e8b03f22647441ade0 LLR: 2.97 (-2.94,2.94) <0.00,2.50> Total: 50296 W: 13410 L: 13108 D: 23778 Elo +2.09 Ptnml(0-2): 196, 5548, 13370, 5826, 208 Passed LTC: https://tests.stockfishchess.org/tests/view/6260a513b03f22647441b970 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 83896 W: 22433 L: 22054 D: 39409 Elo +1.57 Ptnml(0-2): 49, 8273, 24938, 8626, 62 closes https://github.com/official-stockfish/Stockfish/pull/3995 bench: 7729968 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: Fri Apr 22 08:09:40 2022 +0200 Timestamp: 1650607780 Simplify away best move count logic the only place where it was used it was true with >99% probability so it seemed to not be doing much any more. Passed STC: https://tests.stockfishchess.org/tests/view/625f4778d00da81c22dd4c93 LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 85152 W: 22487 L: 22406 D: 40259 Elo +0.33 Ptnml(0-2): 313, 9035, 23818, 9078, 332 Passed LTC: https://tests.stockfishchess.org/tests/view/625ff1f1b03f22647441a215 LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 66776 W: 17768 L: 17673 D: 31335 Elo +0.49 Ptnml(0-2): 46, 6200, 20792, 6313, 37 close https://github.com/official-stockfish/Stockfish/pull/3993 bench 7280798 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 Apr 19 19:59:04 2022 +0200 Timestamp: 1650391144 Update default net to nn-d0b74ce1e5eb.nnue train a net using training data with a heavier weight on positions having 16 pieces on the board. More specifically, with a relative weight of `i * (32-i)/(16 * 16)+1` (where i is the number of pieces on the board). This is done with the trainer branch https://github.com/glinscott/nnue-pytorch/pull/173 The command used is: ``` python train.py $datafile $datafile $restarttype $restartfile --gpus 1 --threads 4 --num-workers 12 --random-fen-skipping=3 --batch-size 16384 --progress_bar_refresh_rate 300 --smart-fen-skipping --features=HalfKAv2_hm^ --lambda=1.00 --max_epochs=$epochs --seed $RANDOM --default_root_dir exp/run_$i ``` The datafile is T60T70wIsRightFarseerT60T74T75T76.binpack, the restart is from the master net. passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 22728 W: 6197 L: 5945 D: 10586 Elo +3.85 Ptnml(0-2): 105, 2453, 6001, 2695, 110 https://tests.stockfishchess.org/tests/view/625cf944ff677a888877cd90 passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 35664 W: 9535 L: 9264 D: 16865 Elo +2.64 Ptnml(0-2): 30, 3524, 10455, 3791, 32 https://tests.stockfishchess.org/tests/view/625d3c32ff677a888877d7ca closes https://github.com/official-stockfish/Stockfish/pull/3989 Bench: 7269563 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: Mon Apr 18 23:05:24 2022 +0200 Timestamp: 1650315924 Restore development version 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: Mon Apr 18 22:03:20 2022 +0200 Timestamp: 1650312200 Stockfish 15 Official release version of Stockfish 15 Bench: 8129754 --- A new major release of Stockfish is now available at https://stockfishchess.org Stockfish 15 continues to push the boundaries of chess, providing unrivalled analysis and playing strength. In our testing, Stockfish 15 is ahead of Stockfish 14 by 36 Elo points and wins nine times more game pairs than it loses[1]. Improvements to the engine have made it possible for Stockfish to end up victorious in tournaments at all sorts of time controls ranging from bullet to classical and even at Fischer random chess[2]. At CCC, Stockfish won all of the latest tournaments: CCC 16 Bullet, Blitz and Rapid, CCC 960 championship, and the CCC 17 Rapid. At TCEC, Stockfish won the Season 21, Cup 9, FRC 4 and in the current Season 22 superfinal, at the time of writing, has won 16 game pairs and not yet lost a single one. This progress is the result of a dedicated team of developers that comes up with new ideas and improvements. For Stockfish 15, we tested nearly 13000 different changes and retained the best 200. These include the fourth generation of our NNUE network architecture, as well as various search improvements. To perform these tests, contributors provide CPU time for testing, and in the last year, they have collectively played roughly a billion chess games. In the last few years, our distributed testing framework, Fishtest, has been operated superbly and has been developed and improved extensively. This work by Pasquale Pigazzini, Tom Vijlbrief, Michel Van den Bergh, and various other developers[3] is an essential part of the success of the Stockfish project. Indeed, the Stockfish project builds on a thriving community of enthusiasts to offer a free and open-source chess engine that is robust, widely available, and very strong. We invite our chess fans to join the Fishtest testing framework and programmers to contribute to the project[4]. The Stockfish team [1] https://tests.stockfishchess.org/tests/view/625d156dff677a888877d1be [2] https://en.wikipedia.org/wiki/Stockfish_(chess)#Competition_results [3] https://github.com/glinscott/fishtest/blob/master/AUTHORS [4] https://stockfishchess.org/get-involved/ 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: KJE-98
Date: Sun Apr 17 21:38:05 2022 +0200 Timestamp: 1650224285 Decrease LMR at PV nodes with low depth. This patch lessens the Late Move Reduction at PV nodes with low depth. Previously the affect of depth on LMR was independant of nodeType. The idea behind this patch is that at PV nodes, LMR at low depth is will miss out on potential alpha-raising moves. Passed STC: https://tests.stockfishchess.org/tests/view/625aa867d3367522c4b8965c LLR: 2.93 (-2.94,2.94) <0.00,2.50> Total: 19360 W: 5252 L: 5006 D: 9102 Elo +4.41 Ptnml(0-2): 79, 2113, 5069, 2321, 98 Passed LTC: https://tests.stockfishchess.org/tests/view/625ae844d3367522c4b8a009 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 39264 W: 10636 L: 10357 D: 18271 Elo +2.47 Ptnml(0-2): 18, 3928, 11473, 4183, 30 closes https://github.com/official-stockfish/Stockfish/pull/3985 bench: 8129754 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 Apr 16 08:41:51 2022 +0200 Timestamp: 1650091311 Tuning classical and NNUE scaling terms changes to parameters in both classical and NNUE scaling, following up from an earlier successful #3958 passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.50> Total: 23936 W: 6490 L: 6234 D: 11212 Elo +3.72 Ptnml(0-2): 107, 2610, 6306, 2810, 135 https://tests.stockfishchess.org/tests/view/625820aa33c40bb9d964e6ae passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 50376 W: 13629 L: 13327 D: 23420 Elo +2.08 Ptnml(0-2): 20, 4979, 14920, 5217, 52 https://tests.stockfishchess.org/tests/view/62584592c1d7f5008a33a4d1 closes https://github.com/official-stockfish/Stockfish/pull/3982 Bench: 6964954 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 Apr 16 08:36:37 2022 +0200 Timestamp: 1650090997 Update WDL model for current SF This updates the WDL model based on the LTC statistics for the last month (8M games). for old results see: https://github.com/official-stockfish/Stockfish/pull/3582 https://github.com/official-stockfish/Stockfish/pull/2778 the model changed a bit from the past, some images to follow in the PR closes https://github.com/official-stockfish/Stockfish/pull/3981 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: Sat Apr 16 08:35:31 2022 +0200 Timestamp: 1650090931 Update CPU contributors closes https://github.com/official-stockfish/Stockfish/pull/3979 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: Topologist
Date: Tue Apr 12 17:43:50 2022 +0200 Timestamp: 1649778230 Use NNUE in low piece endgames close to the root. This patch enforces that NNUE evaluation is used for endgame positions at shallow depth (depth <= 9). Classic evaluation will still be used for high imbalance positions when the depth is high or there are many pieces. Passed STC: https://tests.stockfishchess.org/tests/view/624c193b3a8a6ac93892dc27 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 255840 W: 68024 L: 67362 D: 120454 Elo +0.90 Ptnml(0-2): 1074, 27089, 70926, 27763, 1068 Passed LTC: https://tests.stockfishchess.org/tests/view/624e8675e9e7821808467f77 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 67088 W: 17784 L: 17454 D: 31850 Elo +1.71 Ptnml(0-2): 45, 6209, 20715, 6521, 54 closes https://github.com/official-stockfish/Stockfish/pull/3978 bench: 6602222 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 Apr 1 10:55:11 2022 +0200 Timestamp: 1648803311 Minor cleanups simplify and relocate to position.cpp some of the recent threat calculations used in the movepicker. passed STC: https://tests.stockfishchess.org/tests/view/62468c301f682ea45ce3b3b9 LLR: 2.96 (-2.94,2.94) <-2.25,0.25> Total: 76544 W: 20247 L: 20152 D: 36145 Elo +0.43 Ptnml(0-2): 327, 8113, 21317, 8168, 347 closes https://github.com/official-stockfish/Stockfish/pull/3972 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: Topologist
Date: Mon Mar 28 22:43:52 2022 +0200 Timestamp: 1648500232 Play more positional in endgames This patch chooses the delta value (which skews the nnue evaluation between positional and materialistic) depending on the material: If the material is low, delta will be higher and the evaluation is shifted to the positional value. If the material is high, the evaluation will be shifted to the psqt value. I don't think slightly negative values of delta should be a concern. Passed STC: https://tests.stockfishchess.org/tests/view/62418513b3b383e86185766f LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 28808 W: 7832 L: 7564 D: 13412 Elo +3.23 Ptnml(0-2): 147, 3186, 7505, 3384, 182 Passed LTC: https://tests.stockfishchess.org/tests/view/62419137b3b383e861857842 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 58632 W: 15776 L: 15450 D: 27406 Elo +1.93 Ptnml(0-2): 42, 5889, 17149, 6173, 63 closes https://github.com/official-stockfish/Stockfish/pull/3971 Bench: 7588855 see source |