| 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: Sun Mar 3 15:07:32 2024 +0100 Timestamp: 1709474852 Make binaries executable again in CI closes https://github.com/official-stockfish/Stockfish/pull/5072 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: Sun Mar 3 15:01:29 2024 +0100 Timestamp: 1709474489 Restore development closes https://github.com/official-stockfish/Stockfish/pull/5073 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: Sat Feb 24 18:15:04 2024 +0100 Timestamp: 1708794904 Stockfish 16.1 Official release version of Stockfish 16.1 Bench: 1303971 --- Stockfish 16.1 Today, we have the pleasure to announce Stockfish 16.1. As always, you can freely download it at https://stockfishchess.org/download and use it in the GUI of your choice[1]. Don't forget to join our Discord server[2] to get in touch with the community of developers and users of the project! *Quality of chess play* In our testing against its predecessor, Stockfish 16.1 shows a notable improvement in performance, with an Elo gain of up to 27 points and winning over 2 times more game pairs[3] than it loses. *Update highlights* *Improved evaluation* - Updated neural network architecture: The neural network architecture has undergone two updates and is currently in its 8th version[4]. - Removal of handcrafted evaluation (HCE): This release marks the removal of the traditional handcrafted evaluation and the transition to a fully neural network-based approach[5]. - Dual NNUE: For the first time, Stockfish includes a secondary neural network[6], used to quickly evaluate positions that are easily decided. *UCI Options removed* `Use NNUE` and `UCI_AnalyseMode`[7] have been removed as they no longer had any effect. `SlowMover`[8] has also been removed in favor of `Move Overhead`. *More binaries* We now offer 13 new binaries. These new binaries include `avx512`, `vnni256`, `vnni512`, `m1-apple-silicon`, and `armv8-dotprod`, which take advantage of specific CPU instructions for improved performance. For most users, using `sse41-popcnt` (formerly `modern`), `avx2`, or `bmi2` should be enough, but if your CPU supports these new instructions, feel free to try them! *Development changes* - Updated testing book: This new book[9], now derived exclusively from the open Lichess database[10], is 10 times larger than its predecessor, and has been used to test potential improvements to Stockfish over the past few months. - Consolidation of repositories: Aiming to simplify access to our resources, we have moved most Stockfish-related repositories into the official Stockfish organization[11] on GitHub. - Growing maintainer team: We welcome Disservin[12] to the team of maintainers of the project! This extra pair of hands will ensure the lasting success of Stockfish. *Thank you* The Stockfish project builds on a thriving community of enthusiasts (thanks everybody!) who contribute their expertise, time, and resources to build a free and open-source chess engine that is robust, widely available, and very strong. We would like to express our gratitude for the 10k stars[13] that light up our GitHub project! Thank you for your support and encouragement – your recognition means a lot to us. We invite our chess fans to join the Fishtest testing framework[14], and programmers to contribute to the project either directly to Stockfish[15] (C++), to Fishtest[16] (HTML, CSS, JavaScript, and Python), to our trainer nnue-pytorch[17] (C++ and Python), or to our website[18] (HTML, CSS/SCSS, and JavaScript). The Stockfish team [1] https://github.com/official-stockfish/Stockfish/wiki/Download-and-usage#download-a-chess-gui [2] https://discord.gg/GWDRS3kU6R [3] https://tests.stockfishchess.org/tests/view/65d666051d8e83c78bfddbd8 [4] https://github.com/official-stockfish/nnue-pytorch/blob/master/docs/nnue.md#sfnnv8-architecture [5] https://github.com/official-stockfish/Stockfish/commit/af110e0 [6] https://github.com/official-stockfish/Stockfish/commit/584d9ef [7] https://github.com/official-stockfish/Stockfish/commit/c53d2ec [8] https://github.com/official-stockfish/Stockfish/commit/536d692 [9] https://github.com/official-stockfish/books/commit/426eca4 [10] https://database.lichess.org/ [11] https://github.com/official-stockfish/ [12] https://github.com/Disservin [13] https://github.com/official-stockfish/Stockfish/stargazers [14] https://github.com/official-stockfish/fishtest/wiki/Running-the-worker [15] https://github.com/official-stockfish/Stockfish [16] https://github.com/official-stockfish/fishtest [17] https://github.com/official-stockfish/nnue-pytorch [18] https://github.com/official-stockfish/stockfish-web 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: Sat Feb 24 17:59:41 2024 +0100 Timestamp: 1708793981 Update the WDL model Based on 130M positions from 2.1M games. ``` Look recursively in directory pgns for games from SPRT tests using books matching "UHO_4060_v..epd|UHO_Lichess_4852_v1.epd" for SF revisions between 8e75548f2a10969c1c9211056999efbcebe63f9a (from 2024-02-17 17:11:46 +0100) and HEAD (from 2024-02-17 17:13:07 +0100). Based on 127920843 positions from 2109240 games, NormalizeToPawnValue should change from 345 to 356. ``` The patch only affects the UCI-reported cp and wdl values. closes https://github.com/official-stockfish/Stockfish/pull/5070 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: Sat Feb 24 17:58:44 2024 +0100 Timestamp: 1708793924 Update Top CPU Contributors closes https://github.com/official-stockfish/Stockfish/pull/5069 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: Sat Feb 24 17:57:49 2024 +0100 Timestamp: 1708793869 Expose EvalFileSmall option for small net Since https://github.com/official-stockfish/fishtest/pull/1870 has been merged it's time for this update. 5k Fixed Games showed no problems. https://tests.stockfishchess.org/tests/view/65d9cc274c0e22b904f574d7 closes https://github.com/official-stockfish/Stockfish/pull/5068 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: cj5716
Date: Sat Feb 17 17:13:07 2024 +0100 Timestamp: 1708186387 Simplify PV node reduction Reduce less on PV nodes even with an upperbound TT entry. Passed STC: https://tests.stockfishchess.org/tests/view/65cb3a861d8e83c78bfd0497 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 118752 W: 30441 L: 30307 D: 58004 Elo +0.39 Ptnml(0-2): 476, 14179, 29921, 14335, 465 Passed LTC: https://tests.stockfishchess.org/tests/view/65cd3b951d8e83c78bfd2b0d LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 155058 W: 38549 L: 38464 D: 78045 Elo +0.19 Ptnml(0-2): 85, 17521, 42219, 17632, 72 closes https://github.com/official-stockfish/Stockfish/pull/5057 Bench: 1303971 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 Feb 17 17:11:46 2024 +0100 Timestamp: 1708186306 Update default main net to nn-b1a57edbea57.nnue Created by retraining the previous main net `nn-baff1edbea57.nnue` with: - some of the same options as before: ranger21, more WDL skipping - the addition of T80 nov+dec 2023 data - increasing loss by 15% when prediction is too high, up from 10% - use of torch.compile to speed up training by over 25% ```yaml experiment-name: 2560--S9-514G-T80-augtodec2023-more-wdl-skip-15p-more-loss-high-q-sk28 training-dataset: # https://github.com/official-stockfish/Stockfish/pull/4782 - /data/S6-514G-1ee1aba5ed.binpack - /data/test80-aug2023-2tb7p.v6.min.binpack - /data/test80-sep2023-2tb7p.binpack - /data/test80-oct2023-2tb7p.binpack - /data/test80-nov2023-2tb7p.binpack - /data/test80-dec2023-2tb7p.binpack early-fen-skipping: 28 start-from-engine-test-net: True nnue-pytorch-branch: linrock/nnue-pytorch/r21-more-wdl-skip-15p-more-loss-high-q-torch-compile num-epochs: 1000 lr: 4.375e-4 gamma: 0.995 start-lambda: 1.0 end-lambda: 0.7 ``` Epoch 819 trained with the above config led to this PR. Use of torch.compile decorators in nnue-pytorch model.py was found to speed up training by at least 25% on Ampere gpus when using recent pytorch compiled with cuda 12: https://catalog.ngc.nvidia.com/orgs/nvidia/containers/pytorch See recent main net PRs for more info on - ranger21 and more WDL skipping: https://github.com/official-stockfish/Stockfish/pull/4942 - increasing loss when Q is too high: https://github.com/official-stockfish/Stockfish/pull/4972 Training data can be found at: https://robotmoon.com/nnue-training-data/ Passed STC: https://tests.stockfishchess.org/tests/view/65cd76151d8e83c78bfd2f52 LLR: 2.98 (-2.94,2.94) <0.00,2.00> Total: 78336 W: 20504 L: 20115 D: 37717 Elo +1.73 Ptnml(0-2): 317, 9225, 19721, 9562, 343 Passed LTC: https://tests.stockfishchess.org/tests/view/65ce5be61d8e83c78bfd43e9 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 41016 W: 10492 L: 10159 D: 20365 Elo +2.82 Ptnml(0-2): 22, 4533, 11071, 4854, 28 closes https://github.com/official-stockfish/Stockfish/pull/5056 Bench: 1351997 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: cj5716
Date: Sat Feb 17 17:10:13 2024 +0100 Timestamp: 1708186213 Simplify TT PV reduction This also removes some incorrect fail-high logic. Passed STC: https://tests.stockfishchess.org/tests/view/65cb3b641d8e83c78bfd04a9 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 87968 W: 22634 L: 22468 D: 42866 Elo +0.66 Ptnml(0-2): 315, 10436, 22323, 10588, 322 Passed LTC: https://tests.stockfishchess.org/tests/view/65cccee21d8e83c78bfd222c LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 70794 W: 17846 L: 17672 D: 35276 Elo +0.85 Ptnml(0-2): 44, 7980, 19189, 8126, 58 closes https://github.com/official-stockfish/Stockfish/pull/5055 Bench: 1474424 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: Gahtan Nahdi
Date: Sat Feb 17 17:08:01 2024 +0100 Timestamp: 1708186081 Remove penalty for quiet ttMove that fails low Passed STC non-reg: https://tests.stockfishchess.org/tests/view/65c691a7c865510db0286e6e LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 234336 W: 60258 L: 60255 D: 113823 Elo +0.00 Ptnml(0-2): 966, 28141, 58918, 28210, 933 Passed LTC non-reg: https://tests.stockfishchess.org/tests/view/65c8d0d31d8e83c78bfcd4a6 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 235206 W: 59134 L: 59132 D: 116940 Elo +0.00 Ptnml(0-2): 135, 26908, 63517, 26906, 137 https://github.com/official-stockfish/Stockfish/pull/5054 Bench: 1287996 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: Wed Feb 14 21:39:31 2024 +0100 Timestamp: 1707943171 Use node counting to early stop search This introduces a form of node counting which can be used to further tweak the usage of our search time. The current approach stops the search when almost all nodes are searched on a single move. The idea originally came from Koivisto, but the implemention is a bit different, Koivisto scales the optimal time by the nodes effort and then determines if the search should be stopped. We just scale down the `totalTime` and stop the search if we exceed it and the effort is large enough. Passed STC: https://tests.stockfishchess.org/tests/view/65c8e0661d8e83c78bfcd5ec LLR: 2.97 (-2.94,2.94) <0.00,2.00> Total: 88672 W: 22907 L: 22512 D: 43253 Elo +1.55 Ptnml(0-2): 310, 10163, 23041, 10466, 356 Passed LTC: https://tests.stockfishchess.org/tests/view/65ca632b1d8e83c78bfcf554 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 170856 W: 42910 L: 42320 D: 85626 Elo +1.20 Ptnml(0-2): 104, 18337, 47960, 18919, 108 closes https://github.com/official-stockfish/Stockfish/pull/5053 Bench: 1198939 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: Tierynn Byrnes
Date: Wed Feb 14 21:38:17 2024 +0100 Timestamp: 1707943097 Refactor timeman.cpp Move optExtra, optConstant and maxConstant into lower scope. closes https://github.com/official-stockfish/Stockfish/pull/5052 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: Muzhen Gaming
Date: Wed Feb 14 21:27:55 2024 +0100 Timestamp: 1707942475 VVLTC search tune Search parameters were tuned using 16k games at VVLTC. They were tuned starting with the new parameters (in search only) of PR #5039. Passed VVLTC: https://tests.stockfishchess.org/tests/view/65c8a8fc1d8e83c78bfcd163 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 20826 W: 5355 L: 5100 D: 10371 Elo +4.25 Ptnml(0-2): 1, 1941, 6275, 2194, 2 Passed 2nd VVLTC: https://tests.stockfishchess.org/tests/view/65cadc2d1d8e83c78bfcfdaf LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 17710 W: 4611 L: 4352 D: 8747 Elo +5.08 Ptnml(0-2): 1, 1586, 5422, 1845, 1 STC Elo estimate: https://tests.stockfishchess.org/tests/view/65cb6aed1d8e83c78bfd0802 Elo: -1.46 ± 1.8 (95%) LOS: 5.5% Total: 40000 W: 10267 L: 10435 D: 19298 Elo -1.46 Ptnml(0-2): 200, 4860, 10023, 4742, 175 nElo: -2.77 ± 3.4 (95%) PairsRatio: 0.97 Bench: 1198939 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: Sun Feb 11 20:13:19 2024 +0100 Timestamp: 1707678799 Format code using clang-format 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: Gahtan Nahdi
Date: Sun Feb 11 19:58:35 2024 +0100 Timestamp: 1707677915 Remove quiet tt move extensions Passed STC: https://tests.stockfishchess.org/tests/view/65c6934cc865510db0286e90 LLR: 2.99 (-2.94,2.94) <-1.75,0.25> Total: 54016 W: 14065 L: 13854 D: 26097 Elo +1.36 Ptnml(0-2): 231, 6381, 13581, 6576, 239 Passed LTC: https://tests.stockfishchess.org/tests/view/65c72b91c865510db0287a1a LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 55098 W: 13850 L: 13658 D: 27590 Elo +1.21 Ptnml(0-2): 37, 6257, 14777, 6433, 45 closes https://github.com/official-stockfish/Stockfish/pull/5049 Bench: 1027182 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 11 19:55:26 2024 +0100 Timestamp: 1707677726 Improve thread voting inefficiencies Initialize the unordered map to a reasonable number of buckets and make the move hashes well distributed. For more see https://github.com/official-stockfish/Stockfish/pull/4958#issuecomment-1937351190 Also make bestThreadPV and newThreadPV references so we don't copy entire vectors. closes https://github.com/official-stockfish/Stockfish/pull/5048 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 Feb 11 19:53:45 2024 +0100 Timestamp: 1707677625 Adjust best value in main search depending on depth This patch does similar thing to how it's done for qsearch - in case of fail high adjust result to lower value. Difference is that it is done only for non-pv nodes and it's depth dependent - so lower depth entries will have bigger adjustment and higher depth entries will have smaller adjustment. Passed STC: https://tests.stockfishchess.org/tests/view/65c3c0cbc865510db0283b21 LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 112032 W: 29142 L: 28705 D: 54185 Elo +1.36 Ptnml(0-2): 479, 13152, 28326, 13571, 488 Passed LTC: https://tests.stockfishchess.org/tests/view/65c52e62c865510db02855d5 LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 132480 W: 33457 L: 32936 D: 66087 Elo +1.37 Ptnml(0-2): 67, 14697, 36222, 15156, 98 closes https://github.com/official-stockfish/Stockfish/pull/5047 Bench: 1168241 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: Sun Feb 11 19:52:00 2024 +0100 Timestamp: 1707677520 Assorted cleanups Assorted cleanups closes https://github.com/official-stockfish/Stockfish/pull/5046 No functional change Co-Authored-By: Shahin M. Shahin <41402573+> Co-Authored-By: cj5716 <125858804+> 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: GoldenRare
Date: Sun Feb 11 19:46:55 2024 +0100 Timestamp: 1707677215 Remove unnecessary assignments related to adjusted static evaluation In both search and qsearch, there are instances where we do unadjustedStaticEval = ss->staticEval = eval/bestValue = tte->eval(), but immediately after re-assign ss-static and eval/bestValue to some new value, which makes the initial assignment redundant. closes https://github.com/official-stockfish/Stockfish/pull/5045 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: Sun Feb 11 19:40:33 2024 +0100 Timestamp: 1707676833 Update CI actions - Update codeql to v3 - Switch from dev-drprasad to native github cli - Update softprops/action-gh-release to node 20 commit `thollander/actions-comment-pull-request` needs to be bumped to node20 too, but the author hasnt done so atm closes https://github.com/official-stockfish/Stockfish/pull/5044 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: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Fix the alignment of the transformer buffer Fixes the issue mentioned in https://github.com/official-stockfish/Stockfish/commit/584d9efedcde330eeb96a99215552ddfb06f52ba#r138417600. Thanks to @cj5716 and @peregrineshahin for spotting this! closes https://github.com/official-stockfish/Stockfish/pull/5042 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: Muzhen Gaming
Date: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Remove check extension Passed simplification STC: https://tests.stockfishchess.org/tests/view/65c38d2ac865510db02836cf LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 52288 W: 13578 L: 13371 D: 25339 Elo +1.38 Ptnml(0-2): 197, 6171, 13265, 6250, 261 Passed simplification LTC: https://tests.stockfishchess.org/tests/view/65c4470ec865510db0284473 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 44958 W: 11255 L: 11055 D: 22648 Elo +1.55 Ptnml(0-2): 37, 4962, 12274, 5176, 30 closes https://github.com/official-stockfish/Stockfish/pull/5041 Bench: 1116591 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: gahtan-syarif
Date: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Simplify opponent movecount reduction This removes the reduction decrease that occured when the previous ply had a movecount greater than 7. Passed STC: https://tests.stockfishchess.org/tests/view/65c3f6dac865510db0283ef6 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 11968 W: 3205 L: 2953 D: 5810 Elo +7.32 Ptnml(0-2): 38, 1310, 3064, 1506, 66 Passed LTC: https://tests.stockfishchess.org/tests/view/65c42377c865510db0284217 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 35676 W: 9113 L: 8905 D: 17658 Elo +2.03 Ptnml(0-2): 22, 3893, 9802, 4097, 24 closes https://github.com/official-stockfish/Stockfish/pull/5040 Bench: 1148379 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: cj5716
Date: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Remove simple eval With the recent introduction of the dual NNUE, the need for simple eval is no longer there. Passed STC: https://tests.stockfishchess.org/tests/view/65c1f735c865510db0281652 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 85312 W: 22009 L: 21837 D: 41466 Elo +0.70 Ptnml(0-2): 334, 10155, 21567, 10205, 395 Passed LTC: https://tests.stockfishchess.org/tests/view/65c2d64bc865510db0282810 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 49956 W: 12596 L: 12402 D: 24958 Elo +1.35 Ptnml(0-2): 28, 5553, 13624, 5743, 30 closes https://github.com/official-stockfish/Stockfish/pull/5037 Bench 1213676 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: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Tweak capture scoring for move ordering Move divisor from capture scoring to good capture check and sligthly increase it. This has several effects: - its a speedup because for quience and probcut search the division now never happens. For main search its delayed and can be avoided if a good capture triggers a cutoff - through the higher resolution of scores we have a more granular sorting STC: https://tests.stockfishchess.org/tests/view/65bf2a93c865510db027dc27 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 470016 W: 122150 L: 121173 D: 226693 Elo +0.72 Ptnml(0-2): 2133, 55705, 118374, 56644, 2152 LTC: https://tests.stockfishchess.org/tests/view/65c1d16dc865510db0281339 LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 98988 W: 25121 L: 24667 D: 49200 Elo +1.59 Ptnml(0-2): 77, 10998, 26884, 11464, 71 closes https://github.com/official-stockfish/Stockfish/pull/5036 Bench: 1233867 see source |