| !! latest version !! Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Shawn Xu
Date: Sat May 18 09:32:21 2024 +0200 Timestamp: 1716017541 Simplify Away Quadruple Extensions serendipitous gainer Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 95472 W: 24176 L: 24031 D: 47265 Elo +0.53 Ptnml(0-2): 52, 10533, 26414, 10692, 45 https://tests.stockfishchess.org/tests/live_elo/6647fa596dcff0d1d6b05efa Passed VVLTC 70+7 th 7: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 6772 W: 1793 L: 1583 D: 3396 Elo +10.78 Ptnml(0-2): 0, 502, 2172, 712, 0 https://tests.stockfishchess.org/tests/live_elo/6648277a6dcff0d1d6b05ffb Passed VVLTC 70+7 th 7 (2x): https://tests.stockfishchess.org/tests/view/66484c896dcff0d1d6b0619d LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 5424 W: 1469 L: 1254 D: 2701 Elo +13.78 Ptnml(0-2): 0, 394, 1710, 607, 1 closes https://github.com/official-stockfish/Stockfish/pull/5259 Bench: 1441794 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 May 18 09:29:26 2024 +0200 Timestamp: 1716017366 Use one nnue pawn count multiplier Switch to the value used by the main net. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/6647e8096dcff0d1d6b05e96 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 51040 W: 13249 L: 13044 D: 24747 Elo +1.40 Ptnml(0-2): 139, 6029, 13016, 6160, 176 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/6647f4a46dcff0d1d6b05eea LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 20460 W: 5195 L: 4972 D: 10293 Elo +3.79 Ptnml(0-2): 8, 2178, 5637, 2397, 10 https://github.com/official-stockfish/Stockfish/pull/5258 bench 1887462 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: Shawn Xu
Date: Sat May 18 09:26:42 2024 +0200 Timestamp: 1716017202 Tweak NMP Formula Passed STC: LLR: 2.99 (-2.94,2.94) <0.00,2.00> Total: 241728 W: 62440 L: 61811 D: 117477 Elo +0.90 Ptnml(0-2): 914, 28467, 61458, 29126, 899 https://tests.stockfishchess.org/tests/live_elo/6645992993ce6da3e93b5b99 Passed LTC: LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 167850 W: 42620 L: 42030 D: 83200 Elo +1.22 Ptnml(0-2): 82, 18412, 46354, 18988, 89 https://tests.stockfishchess.org/tests/live_elo/6647c5726dcff0d1d6b05dd3 closes https://github.com/official-stockfish/Stockfish/pull/5257 Bench: 1636018 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 May 18 09:24:23 2024 +0200 Timestamp: 1716017063 Early Exit in Bitboards::sliding_attack() he original code checks for occupancy within the loop condition. By moving this check inside the loop and adding an early exit condition, we can avoid unnecessary iterations if a blocking piece is encountered. Passed stc: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 127200 W: 33129 L: 32700 D: 61371 Elo +1.17 Ptnml(0-2): 424, 13243, 35826, 13694, 413 https://tests.stockfishchess.org/tests/view/664646006dcff0d1d6b05bca closes https://github.com/official-stockfish/Stockfish/pull/5256 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 May 18 09:21:00 2024 +0200 Timestamp: 1716016860 Move smallnet threshold logic into a function Now that the smallnet threshold is no longer a constant, use a function to organize it with other eval code. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/66459fa093ce6da3e93b5ba2 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 217600 W: 56281 L: 56260 D: 105059 Elo +0.03 Ptnml(0-2): 756, 23787, 59729, 23736, 792 closes https://github.com/official-stockfish/Stockfish/pull/5255 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 May 18 09:19:10 2024 +0200 Timestamp: 1716016750 Update default main net to nn-c721dfca8cd3.nnue Created by first retraining the spsa-tuned main net `nn-ae6a388e4a1a.nnue` with: - using v6-dd data without bestmove captures removed - addition of T80 mar2024 data - increasing loss by 20% when Q is too high - torch.compile changes for marginal training speed gains And then SPSA tuning weights of epoch 899 following methods described in: https://github.com/official-stockfish/Stockfish/pull/5149 This net was reached at 92k out of 120k steps in this 70+0.7 th 7 SPSA tuning run: https://tests.stockfishchess.org/tests/view/66413b7df9f4e8fc783c9bbb Thanks to @Viren6 for suggesting usage of: - c value 4 for the weights - c value 128 for the biases Scripts for automating applying fishtest spsa params to exporting tuned .nnue are in: https://github.com/linrock/nnue-tools/tree/master/spsa Before spsa tuning, epoch 899 was nn-f85738aefa84.nnue https://tests.stockfishchess.org/tests/view/663e5c893a2f9702074bc167 After initially training with max-epoch 800, training was resumed with max-epoch 1000. ``` experiment-name: 3072--S11--more-data-v6-dd-t80-mar2024--see-ge0-20p-more-loss-high-q-sk28-l8 nnue-pytorch-branch: linrock/nnue-pytorch/3072-r21-skip-more-wdl-see-ge0-20p-more-loss-high-q-torch-compile-more start-from-engine-test-net: False start-from-model: /data/config/apr2024-3072/nn-ae6a388e4a1a.nnue early-fen-skipping: 28 training-dataset: /data/S11-mar2024/: - leela96.v2.min.binpack - test60-2021-11-12-novdec-12tb7p.v6-dd.min.binpack - test78-2022-01-to-05-jantomay-16tb7p.v6-dd.min.binpack - test80-2022-06-jun-16tb7p.v6-dd.min.binpack - test80-2022-08-aug-16tb7p.v6-dd.min.binpack - test80-2022-09-sep-16tb7p.v6-dd.min.binpack - test80-2023-01-jan-16tb7p.v6-sk20.min.binpack - test80-2023-02-feb-16tb7p.v6-sk20.min.binpack - test80-2023-03-mar-2tb7p.v6-sk16.min.binpack - test80-2023-04-apr-2tb7p.v6-sk16.min.binpack - test80-2023-05-may-2tb7p.v6.min.binpack # https://github.com/official-stockfish/Stockfish/pull/4782 - test80-2023-06-jun-2tb7p.binpack - test80-2023-07-jul-2tb7p.binpack # https://github.com/official-stockfish/Stockfish/pull/4972 - test80-2023-08-aug-2tb7p.v6.min.binpack - test80-2023-09-sep-2tb7p.binpack - test80-2023-10-oct-2tb7p.binpack # S9 new data: https://github.com/official-stockfish/Stockfish/pull/5056 - test80-2023-11-nov-2tb7p.binpack - test80-2023-12-dec-2tb7p.binpack # S10 new data: https://github.com/official-stockfish/Stockfish/pull/5149 - test80-2024-01-jan-2tb7p.binpack - test80-2024-02-feb-2tb7p.binpack # S11 new data - test80-2024-03-mar-2tb7p.binpack /data/filt-v6-dd/: - test77-dec2021-16tb7p-filter-v6-dd.binpack - test78-juntosep2022-16tb7p-filter-v6-dd.binpack - test79-apr2022-16tb7p-filter-v6-dd.binpack - test79-may2022-16tb7p-filter-v6-dd.binpack - test80-jul2022-16tb7p-filter-v6-dd.binpack - test80-oct2022-16tb7p-filter-v6-dd.binpack - test80-nov2022-16tb7p-filter-v6-dd.binpack num-epochs: 1000 lr: 4.375e-4 gamma: 0.995 start-lambda: 0.8 end-lambda: 0.7 ``` Training data can be found at: https://robotmoon.com/nnue-training-data/ Local elo at 25k nodes per move: nn-epoch899.nnue : 4.6 +/- 1.4 Passed STC: https://tests.stockfishchess.org/tests/view/6645454893ce6da3e93b31ae LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 95232 W: 24598 L: 24194 D: 46440 Elo +1.47 Ptnml(0-2): 294, 11215, 24180, 11647, 280 Passed LTC: https://tests.stockfishchess.org/tests/view/6645522d93ce6da3e93b31df LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 320544 W: 81432 L: 80524 D: 158588 Elo +0.98 Ptnml(0-2): 164, 35659, 87696, 36611, 142 closes https://github.com/official-stockfish/Stockfish/pull/5254 bench 1995552 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: Rak Laptudirm
Date: Sat May 18 09:18:14 2024 +0200 Timestamp: 1716016694 Improve comment closes https://github.com/official-stockfish/Stockfish/pull/5249 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 May 16 14:19:28 2024 +0200 Timestamp: 1715861968 Lower smallnet threshold linearly as pawn count decreases Passed STC: https://tests.stockfishchess.org/tests/view/6644f677324e96f42f89d894 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 377920 W: 97135 L: 96322 D: 184463 Elo +0.75 Ptnml(0-2): 1044, 44259, 97588, 44978, 1091 Passed LTC: https://tests.stockfishchess.org/tests/view/664548af93ce6da3e93b31b3 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 169056 W: 42901 L: 42312 D: 83843 Elo +1.21 Ptnml(0-2): 58, 18538, 46753, 19115, 64 closes https://github.com/official-stockfish/Stockfish/pull/5252 Bench: 1991750 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: Thu May 16 14:17:53 2024 +0200 Timestamp: 1715861873 Revert "Reduce more when improving and ttvalue is lower than alpha" The patch regressed significantly at longer time controls. Passed VLTC: https://tests.stockfishchess.org/tests/view/6644c7a2bc537f5619453096 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 43336 W: 11177 L: 10884 D: 21275 Elo +2.35 Ptnml(0-2): 3, 4432, 12507, 4721, 5 Passed VVLTC: https://tests.stockfishchess.org/tests/view/66450c974aa4fa9a83b6d0b0 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 32394 W: 8350 L: 8072 D: 15972 Elo +2.98 Ptnml(0-2): 2, 2798, 10317, 3080, 0 closes https://github.com/official-stockfish/Stockfish/pull/5251 Bench: 1594188 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 May 16 14:16:54 2024 +0200 Timestamp: 1715861814 Use same nnue divisor for both nets Passed non-regression STC: https://tests.stockfishchess.org/tests/view/6643ceeabc537f56194506f6 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 224800 W: 57910 L: 57896 D: 108994 Elo +0.02 Ptnml(0-2): 673, 26790, 57519, 26686, 732 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/6643ff15bc537f5619451719 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 347658 W: 87574 L: 87688 D: 172396 Elo -0.11 Ptnml(0-2): 207, 39004, 95488, 38956, 174 closes https://github.com/official-stockfish/Stockfish/pull/5250 Bench: 1804704 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: Wed May 15 16:27:03 2024 +0200 Timestamp: 1715783223 Simplifying improving and worsening deduction formulas Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 77696 W: 20052 L: 19878 D: 37766 Elo +0.78 Ptnml(0-2): 222, 9124, 19994, 9274, 234 https://tests.stockfishchess.org/tests/view/66440032bc537f561945171e Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 234414 W: 58874 L: 58871 D: 116669 Elo +0.00 Ptnml(0-2): 96, 26147, 64742, 26102, 120 https://tests.stockfishchess.org/tests/view/6644094cbc537f5619451735 closes https://github.com/official-stockfish/Stockfish/pull/5248 Bench: 1336738 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: Wed May 15 16:26:00 2024 +0200 Timestamp: 1715783160 Use same eval divisor for both nets Passed non-regression STC: https://tests.stockfishchess.org/tests/view/66428f146577e9d2c8a29cf8 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 241024 W: 62173 L: 62177 D: 116674 Elo -0.01 Ptnml(0-2): 904, 28648, 61407, 28654, 899 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/6643ae6f1f32a966da74977b LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 193710 W: 48762 L: 48717 D: 96231 Elo +0.08 Ptnml(0-2): 70, 21599, 53481, 21626, 79 closes https://github.com/official-stockfish/Stockfish/pull/5246 Bench: 1700680 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: Wed May 15 16:20:14 2024 +0200 Timestamp: 1715782814 Reduce more when improving and ttvalue is lower than alpha More reduction if position is improving but value from TT doesn't exceeds alpha but the tt move is excluded. This idea is based on following LMR condition tuning https://tests.stockfishchess.org/tests/view/66423a1bf9f4e8fc783cba37 by using only three of the four largest terms P[3], P[18] and P[12]. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 27840 W: 7309 L: 7004 D: 13527 Elo +3.81 Ptnml(0-2): 85, 3219, 7018, 3502, 96 https://tests.stockfishchess.org/tests/view/6643dc1cbc537f56194508ba Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 191280 W: 48656 L: 48020 D: 94604 Elo +1.16 Ptnml(0-2): 78, 20979, 52903, 21589, 91 https://tests.stockfishchess.org/tests/view/6643e543bc537f5619451683 closes https://github.com/official-stockfish/Stockfish/pull/5245 Bench: 1430835 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 May 15 16:19:04 2024 +0200 Timestamp: 1715782744 Call adjustEval with correct parameters after rescore Set smallNet to false after rescoring so we call adjustEval() w/ correct parameters. STC: https://tests.stockfishchess.org/tests/view/664308687134c82f3f7a4003 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 146912 W: 37856 L: 37756 D: 71300 Elo +0.24 Ptnml(0-2): 566, 17562, 37122, 17618, 588 LTC: https://tests.stockfishchess.org/tests/view/6643a0821f32a966da7485d6 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 390414 W: 98015 L: 98173 D: 194226 Elo -0.14 Ptnml(0-2): 162, 43555, 107929, 43401, 160 closes https://github.com/official-stockfish/Stockfish/pull/5244 Bench: 1819318 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 May 15 16:15:15 2024 +0200 Timestamp: 1715782515 Add extra bonus to pawn history for a move that caused a fail low Basically the same idea as it is for continuation/main history, but it has some tweaks. 1) it has * 2 multiplier for bonus instead of full/half bonus - for whatever reason this seems to work better; 2) attempts with this type of big bonuses scaled somewhat poorly (or were unlucky at longer time controls), but after measuring the fact that average value of pawn history in LMR after adding this bonuses increased by substantial number (for multiplier 1,5 it increased by smth like 400~ from 8192 cap) attempts were made to make default pawn history negative to compensate it - and version with multiplier 2 and initial fill value -900 passed. Passed STC: https://tests.stockfishchess.org/tests/view/66424815f9f4e8fc783cba59 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 115008 W: 30001 L: 29564 D: 55443 Elo +1.32 Ptnml(0-2): 432, 13629, 28903, 14150, 390 Passed LTC: https://tests.stockfishchess.org/tests/view/6642f5437134c82f3f7a3ffa LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 56448 W: 14432 L: 14067 D: 27949 Elo +2.25 Ptnml(0-2): 36, 6268, 15254, 6627, 39 Bench: 1857237 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: Wed May 15 16:13:43 2024 +0200 Timestamp: 1715782423 Add extra bonus for high-depth condition Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 54208 W: 14058 L: 13717 D: 26433 Elo +2.19 Ptnml(0-2): 166, 6277, 13885, 6602, 174 https://tests.stockfishchess.org/tests/view/664136d8f9f4e8fc783c9b82 Passed LTC: LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 112548 W: 28492 L: 28018 D: 56038 Elo +1.46 Ptnml(0-2): 53, 12186, 31318, 12668, 49 https://tests.stockfishchess.org/tests/view/664143fef9f4e8fc783c9bf6 closes https://github.com/official-stockfish/Stockfish/pull/5242 Bench: 1725980 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: Wed May 15 16:09:30 2024 +0200 Timestamp: 1715782170 Use 5% less time on first move Stockfish appears to take too much time on the first move of a game and then not enough on moves 2,3,4... Probably caused by most of the factors that increase time usually applying on the first move. Attempts to give more time to the subsequent moves have not worked so far, but this change to simply reduce first move time by 5% worked. STC 10+0.1 : LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 78496 W: 20516 L: 20135 D: 37845 Elo +1.69 Ptnml(0-2): 340, 8859, 20456, 9266, 327 https://tests.stockfishchess.org/tests/view/663d47bf507ebe1c0e9200ba LTC 60+0.6 : LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 94872 W: 24179 L: 23751 D: 46942 Elo +1.57 Ptnml(0-2): 61, 9743, 27405, 10161, 66 https://tests.stockfishchess.org/tests/view/663e779cbb28828150dd9089 closes https://github.com/official-stockfish/Stockfish/pull/5235 Bench: 1876282 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: Mon May 13 07:32:32 2024 +0200 Timestamp: 1715578352 Optimize update_accumulator_refresh_cache() STC https://tests.stockfishchess.org/tests/view/664105df26ac5f9b286d30e6 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 178528 W: 46235 L: 45750 D: 86543 Elo +0.94 Ptnml(0-2): 505, 17792, 52142, 18363, 462 Combo of two yellow speedups https://tests.stockfishchess.org/tests/view/6640abf9d163897c63214f5c LLR: -2.93 (-2.94,2.94) <0.00,2.00> Total: 355744 W: 91714 L: 91470 D: 172560 Elo +0.24 Ptnml(0-2): 913, 36233, 103384, 36381, 961 https://tests.stockfishchess.org/tests/view/6628ce073fe04ce4cefc739c LLR: -2.93 (-2.94,2.94) <0.00,2.00> Total: 627040 W: 162001 L: 161339 D: 303700 Elo +0.37 Ptnml(0-2): 2268, 72379, 163532, 73105, 2236 closes https://github.com/official-stockfish/Stockfish/pull/5239 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: Mon May 13 07:30:18 2024 +0200 Timestamp: 1715578218 Re-evaluate some small net positions for more accurate evals Use main net evals when small net evals hint that higher eval accuracy may be worth the slower eval speeds. With Finny caches, re-evals with the main net are less expensive than before. Original idea by mstembera who I've added as co-author to this PR. Based on reEval tests by mstembera: https://tests.stockfishchess.org/tests/view/65e69187b6345c1b934866e5 https://tests.stockfishchess.org/tests/view/65e863aa0ec64f0526c3e991 A few variants of this patch also passed LTC: https://tests.stockfishchess.org/tests/view/663d2108507ebe1c0e91f407 https://tests.stockfishchess.org/tests/view/663e388c3a2f9702074bc152 Passed STC: https://tests.stockfishchess.org/tests/view/663dadbd1a61d6377f190e2c LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 92320 W: 23941 L: 23531 D: 44848 Elo +1.54 Ptnml(0-2): 430, 10993, 22931, 11349, 457 Passed LTC: https://tests.stockfishchess.org/tests/view/663ef48b2948bf9aa698690c LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 98934 W: 24907 L: 24457 D: 49570 Elo +1.58 Ptnml(0-2): 48, 10952, 27027, 11382, 58 closes https://github.com/official-stockfish/Stockfish/pull/5238 bench 1876282 Co-Authored-By: mstembera <5421953+> 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: Mon May 13 07:25:22 2024 +0200 Timestamp: 1715577922 Simplify npm constants when adjusting eval Passed non-regression STC: https://tests.stockfishchess.org/tests/view/663d0c4f507ebe1c0e91ec8d LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 162784 W: 41987 L: 41906 D: 78891 Elo +0.17 Ptnml(0-2): 520, 19338, 41591, 19427, 516 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/663d20fd507ebe1c0e91f405 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 457242 W: 115022 L: 115250 D: 226970 Elo -0.17 Ptnml(0-2): 271, 51566, 125179, 51330, 275 closes https://github.com/official-stockfish/Stockfish/pull/5237 Bench: 2238216 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: Mon May 13 07:22:11 2024 +0200 Timestamp: 1715577731 Adjust standpat return value in qsearch Instead of returning value itself return value between it and beta for non pv nodes - analogous to what we do after actual search there. Passed STC: https://tests.stockfishchess.org/tests/view/663cb1b4c0b75d7f7b98188e LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 131552 W: 34131 L: 33673 D: 63748 Elo +1.21 Ptnml(0-2): 420, 15446, 33600, 15876, 434 Passed LTC: https://tests.stockfishchess.org/tests/view/663cda5dc0b75d7f7b981c6f LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 282798 W: 71658 L: 70833 D: 140307 Elo +1.01 Ptnml(0-2): 112, 31187, 77979, 32006, 115 closes https://github.com/official-stockfish/Stockfish/pull/5233 Bench: 1606672 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: Mon May 13 07:20:03 2024 +0200 Timestamp: 1715577603 VVLTC search tune Tuned at 111k games of VVLTC. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/664090c6d163897c63214324 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 83046 W: 21071 L: 20747 D: 41228 Elo +1.36 Ptnml(0-2): 2, 7574, 26048, 7896, 3 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/6640cb2abaa6260a5688dc17 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 68630 W: 17620 L: 17270 D: 33740 Elo +1.77 Ptnml(0-2): 4, 6242, 21471, 6596, 2 closes https://github.com/official-stockfish/Stockfish/pull/5240 Bench: 1752471 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: Shawn Xu
Date: Mon May 13 07:16:59 2024 +0200 Timestamp: 1715577419 simplify away quietCheckEvasions pruning simplifies away the pruning of quiet evasion moves in quiescent search. Passed STC: LLR: 2.98 (-2.94,2.94) <-1.75,0.25> Total: 343520 W: 88356 L: 88470 D: 166694 Elo -0.12 Ptnml(0-2): 1061, 40073, 89706, 39759, 1161 https://tests.stockfishchess.org/tests/view/663c7ddfc0b75d7f7b980f3b Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 168744 W: 42454 L: 42384 D: 83906 Elo +0.14 Ptnml(0-2): 75, 18678, 46782, 18776, 61 https://tests.stockfishchess.org/tests/view/663ce34fc0b75d7f7b981ed9 closes https://github.com/official-stockfish/Stockfish/pull/5231 bench 3681552 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: xu-shawn
Date: Mon May 13 07:15:25 2024 +0200 Timestamp: 1715577325 Fix usage of abs vs std::abs closes https://github.com/official-stockfish/Stockfish/pull/5229 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: Shawn Xu
Date: Thu May 9 09:02:57 2024 +0200 Timestamp: 1715238177 Simplify Away Negative Extension This patch simplifies away the negative extension applied when the value returned by the transposition table is assumed to fail low over the value of reduced search. Passed STC: LLR: 2.99 (-2.94,2.94) <-1.75,0.25> Total: 248736 W: 64293 L: 64302 D: 120141 Elo -0.01 Ptnml(0-2): 925, 29833, 62831, 29884, 895 https://tests.stockfishchess.org/tests/view/663bee3bca93dad645f7f64a Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 254970 W: 64289 L: 64308 D: 126373 Elo -0.03 Ptnml(0-2): 110, 28428, 70422, 28421, 104 https://tests.stockfishchess.org/tests/view/663c11f0c0b75d7f7b97d4bb closes https://github.com/official-stockfish/Stockfish/pull/5226 Bench: 2353057 see source |