| 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 |
| 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: Fri Feb 9 19:06:25 2024 +0100 Timestamp: 1707501985 Refactor the CI workflows This refactors the CI workflows to group some logic and makes sure that all (pre)release binaries are actually tested. The screenshot below shows the execution logic of the reworked ci, https://github.com/Disservin/Stockfish/actions/runs/7773581379. You can also hover over the cards to see the execution flow. The `matrix.json` and `arm_matrix.json` define the binaries which will be uploaded to GitHub. Afterwards a matrix is created and each job compiles a profile guided build for that arch and uploads that as an artifact to GitHub. The Binaries/ARM_Binaries workflow's are called when the previous step has been completed, and uploads all artifacts to the (pre)release. This also fixes some indentations and renames the workflows, see https://github.com/official-stockfish/Stockfish/actions, where every workflow is called `Stockfish` vs https://github.com/Disservin/Stockfish/actions. It also increases the parallel compilation used for make from `-j2 to -j4`. It now also prevents the prerelease action from running on forks. A test release can be viewed here https://github.com/Disservin/Stockfish/releases. closes https://github.com/official-stockfish/Stockfish/pull/5035 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: Fri Feb 9 19:06:24 2024 +0100 Timestamp: 1707501984 Assorted trivial cleanups Renaming doubleExtensions variable to multiExtensions, since now we have also triple extensions. Some extra cleanups. Recent tests used to measure the elo worth: https://tests.stockfishchess.org/tests/view/659fd0c379aa8af82b96abc3 https://tests.stockfishchess.org/tests/view/65a8f3da79aa8af82b9751e3 https://tests.stockfishchess.org/tests/view/65b51824c865510db0272740 https://tests.stockfishchess.org/tests/view/65b58fbfc865510db0272f5b closes https://github.com/official-stockfish/Stockfish/pull/5032 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: Sat Feb 3 17:40:07 2024 +0100 Timestamp: 1706978407 VVLTC search tune Search parameters were tuned at 60+0.6 8-thread. Link to the tuning attempt: https://tests.stockfishchess.org/tests/view/65b84e8dc865510db0276030 The most significant change is the triple extension parameter, from 200 to 78. This presumably improves scaling. Additionally, the value < singularBeta - 2 condition for double extensions was removed. This can simply be considered a parameter tweak from 2 to 0. Passed VVLTC: https://tests.stockfishchess.org/tests/view/65baec69c865510db0278f19 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 26136 W: 6564 L: 6305 D: 13267 Elo +3.44 Ptnml(0-2): 2, 2413, 7977, 2676, 0 Passed VVLTC vs passed PR #5027: https://tests.stockfishchess.org/tests/view/65bc2adfc865510db027a561 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 52968 W: 13372 L: 13046 D: 26550 Elo +2.14 Ptnml(0-2): 4, 4944, 16265, 5264, 7 STC Elo estimate: https://tests.stockfishchess.org/tests/view/65be5514c865510db027cbc5 closes https://github.com/official-stockfish/Stockfish/pull/5029 Bench: 1478189 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: gab8192
Date: Sat Feb 3 17:30:41 2024 +0100 Timestamp: 1706977841 Simplify LMR condition Apply LMR on captures the same way it is applied on quiets Passed Non-Reg STC: https://tests.stockfishchess.org/tests/view/65bbf39bc865510db027a14a LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 77152 W: 19970 L: 19791 D: 37391 Elo +0.81 Ptnml(0-2): 304, 9159, 19496, 9288, 329 Passed Non-Reg LTC: https://tests.stockfishchess.org/tests/view/65bc8889c865510db027ac9e LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 103230 W: 25997 L: 25858 D: 51375 Elo +0.47 Ptnml(0-2): 71, 11687, 27958, 11830, 69 Hit rate of removed condition (!ss->ttPv || !capture || (cutNode && (ss - 1)->moveCount > 1)) Total 1253801 Hits 1228904 Hit Rate (%) 98.0143 Hit rate of previous LMR (depth >= 2 && moveCount > 1 + rootNode && ...) Total 1253801 Hits 727234 Hit Rate (%) 58.0023 Hit rate of simplified LMR (depth >= 2 && moveCount > 1 + rootNode) Total 1201839 Hits 713540 Hit Rate (%) 59.3707 closes https://github.com/official-stockfish/Stockfish/pull/5028 Bench: 1438224 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: Viren6
Date: Sat Feb 3 17:26:42 2024 +0100 Timestamp: 1706977602 Introduce Triple Extensions This replaces singularquietLMR with triple instead of double extending non-capture ttmoves that have value far below singularBeta. This threshold value is initially set to 200, there is scope for more scaling by reducing it as occured with double extensions. Passed STC: https://tests.stockfishchess.org/tests/view/65b683b8c865510db0274074 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 222912 W: 58141 L: 57535 D: 107236 Elo +0.94 Ptnml(0-2): 1063, 26244, 56154, 27014, 981 Passed LTC: https://tests.stockfishchess.org/tests/view/65bae6d4c865510db0278eb5 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 66306 W: 16825 L: 16440 D: 33041 Elo +2.02 Ptnml(0-2): 40, 7374, 17952, 7735, 52 closes https://github.com/official-stockfish/Stockfish/pull/5027 bench 1394701 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 Feb 3 17:09:05 2024 +0100 Timestamp: 1706976545 Simplify the extension formula Simplify the extension formula in the case of cutNode by removing the depth condition and always setting extension to -2. Passed STC: LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 277280 W: 70760 L: 70802 D: 135718 Elo -0.05 Ptnml(0-2): 971, 31775, 73153, 31807, 934 https://tests.stockfishchess.org/tests/view/65ad08f779aa8af82b979dd6 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 452976 W: 112992 L: 113215 D: 226769 Elo -0.17 Ptnml(0-2): 266, 51041, 124112, 50788, 281 https://tests.stockfishchess.org/tests/view/65ae466fc865510db026a760 closes https://github.com/official-stockfish/Stockfish/pull/5021 Bench: 1492957 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 3 16:55:10 2024 +0100 Timestamp: 1706975710 Add Apple Silicon Runners to CI GitHub CI runners are available for macOS 14, these runners are using apple silicon chips (M1). https://github.blog/changelog/2024-01-30-github-actions-introducing-the-new-m1-macos-runner-available-to-open-source/ closes https://github.com/official-stockfish/Stockfish/pull/5025 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 3 16:50:31 2024 +0100 Timestamp: 1706975431 Refactor pv printing Also fix the case which is currently printing depth 0. fixes #5019 closes https://github.com/official-stockfish/Stockfish/pull/5020 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 3 16:43:23 2024 +0100 Timestamp: 1706975003 Simplify array initializations also retire a few std::memset calls. Passed non-regresion STC: https://tests.stockfishchess.org/tests/view/65b8e162c865510db0276901 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 97504 W: 25294 L: 25140 D: 47070 Elo +0.55 Ptnml(1-2): 378, 11102, 25667, 11198, 407 closes https://github.com/official-stockfish/Stockfish/pull/5018 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: Viren6
Date: Fri Jan 26 21:15:07 2024 +0100 Timestamp: 1706300107 Use ttPv in depth condition of singular extensions This replaces the PvNode condition and tte Pv call previously with using the precomputed ttPv, and also removes the multiplier of 2. This new depth condition occurs with approximately equal frequency (47%) to the old depth condition (measured when the other conditions in the if are true), so non-linear scaling behaviour isn't expected. Passed Non-Reg STC: https://tests.stockfishchess.org/tests/view/65b0e132c865510db026da27 LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 243232 W: 62432 L: 62437 D: 118363 Elo -0.01 Ptnml(0-2): 910, 28937, 61900, 28986, 883 Passed Non-Reg LTC: https://tests.stockfishchess.org/tests/view/65b2053bc865510db026eea1 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 190596 W: 47666 L: 47618 D: 95312 Elo +0.09 Ptnml(0-2): 115, 21710, 51596, 21766, 111 closes https://github.com/official-stockfish/Stockfish/pull/5015 Bench: 1492957 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: Ahmed Kerimov
Date: Fri Jan 26 21:00:41 2024 +0100 Timestamp: 1706299241 Move OnChange callback in Option ctors Parameter 'f' is passed by value and only copied once. Moving it to avoid unnecessary copies. closes https://github.com/official-stockfish/Stockfish/pull/5014 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: Fri Jan 26 20:55:16 2024 +0100 Timestamp: 1706298916 Do more double extensions Parameter tweak from Black Marlin chess engine. Choose a significantly lower value that triggers in 95% of cases, compared to the usual 84% in standard benchmark runs. Since the introduction by https://github.com/official-stockfish/Stockfish/commit/33a858eaa1f792b3413384a3d0993dba36aca92e this constant has only decreased in value over time. 2-16-17-18-21-22-25-26-52-71-75-93-140 Failed STC really fast: https://tests.stockfishchess.org/tests/view/65b11d05c865510db026df7b LLR: -2.94 (-2.94,2.94) <0.00,2.00> Total: 13216 W: 3242 L: 3485 D: 6489 Elo -6.39 Ptnml(0-2): 50, 1682, 3371, 1471, 34 Was reasonable at LTC: https://tests.stockfishchess.org/tests/view/65b13e20c865510db026e210 Elo: 1.18 ± 1.5 (95%) LOS: 94.3% Total: 50000 W: 12517 L: 12347 D: 25136 Elo +1.18 Ptnml(0-2): 31, 5598, 13579, 5754, 38 nElo: 2.45 ± 3.0 (95%) PairsRatio: 1.03 Passed VLTC with STC bounds: https://tests.stockfishchess.org/tests/view/65b18870c865510db026e769 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 30456 W: 7726 L: 7448 D: 15282 Elo +3.17 Ptnml(0-2): 6, 3111, 8717, 3387, 7 Passed VVLTC with LTC bounds: https://tests.stockfishchess.org/tests/view/65b20b95c865510db026eef0 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 36134 W: 9158 L: 8859 D: 18117 Elo +2.88 Ptnml(0-2): 3, 3455, 10850, 3758, 1 closes https://github.com/official-stockfish/Stockfish/pull/5013 Bench: 1503692 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: Fri Jan 26 20:52:26 2024 +0100 Timestamp: 1706298746 Move perft out of search This splits the logic of search and perft. Before, threads were started, which then constructed a search object, which then started perft and returned immediately. All of this is unnecessary, instead uci should start perft right away. closes https://github.com/official-stockfish/Stockfish/pull/5008 No functional change see source |