| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: Taras Vuk
Date: Wed Aug 28 09:34:09 2024 +0200 Timestamp: 1724830449 rename !(PvNode || cutNode) to allNode Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 108992 W: 28178 L: 28039 D: 52775 Elo +0.44 Ptnml(0-2): 356, 12428, 28762, 12621, 329 https://tests.stockfishchess.org/tests/view/66c73a51bf8c9d8780fda532 closes https://github.com/official-stockfish/Stockfish/pull/5549 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: Tomasz Sobczyk
Date: Wed Aug 28 08:52:24 2024 +0200 Timestamp: 1724827944 Forcibly split NUMA nodes on Windows split by processor groups due to Window's thread scheduler issues. fixes #5551 closes https://github.com/official-stockfish/Stockfish/pull/5552 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: Taras Vuk
Date: Tue Aug 20 21:37:25 2024 +0200 Timestamp: 1724182645 Tweak late move extensions Allow late move extensions only for PV and cut nodes. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 44512 W: 11688 L: 11355 D: 21469 Elo +2.60 Ptnml(0-2): 167, 5180, 11229, 5513, 167 https://tests.stockfishchess.org/tests/view/66c0509d4ff211be9d4ef10e Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 152970 W: 39026 L: 38466 D: 75478 Elo +1.27 Ptnml(0-2): 102, 16792, 42164, 17298, 129 https://tests.stockfishchess.org/tests/view/66c0994d21503a509c13b2b6 closes https://github.com/official-stockfish/Stockfish/pull/5541 bench: 1484730 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 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: Tue Aug 20 21:34:19 2024 +0200 Timestamp: 1724182459 Introduce Fail Low History Bonus When a node fails low, give TT move a small bonus 1/4 of normal value. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 92384 W: 24094 L: 23691 D: 44599 Elo +1.52 Ptnml(0-2): 323, 10852, 23465, 11203, 349 https://tests.stockfishchess.org/tests/view/66be80794ff211be9d4eed68 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 114660 W: 29260 L: 28778 D: 56622 Elo +1.46 Ptnml(0-2): 97, 12506, 31653, 12966, 108 https://tests.stockfishchess.org/tests/view/66bf63ee4ff211be9d4eeef0 closes https://github.com/official-stockfish/Stockfish/pull/5539 bench 1463003 see source |
| Windows x64 for Haswell CPUs 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: Nonlinear2
Date: Tue Aug 20 21:31:33 2024 +0200 Timestamp: 1724182293 Simplify stand pat adjustement Remove && !PvNode condition for stand pat adjustement in quiescence search. Passed non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 108544 W: 28228 L: 28085 D: 52231 Elo +0.46 Ptnml(0-2): 389, 12902, 27554, 13031, 396 https://tests.stockfishchess.org/tests/view/66bb402e4ff211be9d4ee688 Passed non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 193014 W: 48796 L: 48751 D: 95467 Elo +0.08 Ptnml(0-2): 188, 21481, 53116, 21542, 180 https://tests.stockfishchess.org/tests/view/66bc78774ff211be9d4ee88f closes https://github.com/official-stockfish/Stockfish/pull/5538 Bench 1787360 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: Tue Aug 20 21:27:58 2024 +0200 Timestamp: 1724182078 Simplify doShallowerSearch Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 242336 W: 62657 L: 62663 D: 117016 Elo -0.01 Ptnml(0-2): 941, 28949, 61418, 28895, 965 https://tests.stockfishchess.org/tests/view/66bc13c34ff211be9d4ee794 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 128100 W: 32503 L: 32390 D: 63207 Elo +0.31 Ptnml(0-2): 106, 14319, 35113, 14380, 132 https://tests.stockfishchess.org/tests/view/66bdbb304ff211be9d4eec5d closes https://github.com/official-stockfish/Stockfish/pull/5537 bench 1586246 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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: Tue Aug 20 21:24:04 2024 +0200 Timestamp: 1724181844 Simplify bestMove promotion Passed Non-regression STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 216768 W: 56240 L: 56217 D: 104311 Elo +0.04 Ptnml(0-2): 794, 24900, 56956, 24957, 777 https://tests.stockfishchess.org/tests/view/66bc11324ff211be9d4ee78b Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 44970 W: 11391 L: 11199 D: 22380 Elo +1.48 Ptnml(0-2): 44, 4596, 13002, 4810, 33 https://tests.stockfishchess.org/tests/view/66bdbb1b4ff211be9d4eec5a closes https://github.com/official-stockfish/Stockfish/pull/5535 bench: 1613043 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: Tue Aug 20 20:59:36 2024 +0200 Timestamp: 1724180376 Update default main net to nn-1111cefa1111.nnue Created from 2 distinct spsa tunes of the latest main net (nn-31337bea577c.nnue) and applying the params to the prior main net (nn-e8bac1c07a5a.nnue). This effectively reverts the modifications to output weights and biases in https://github.com/official-stockfish/Stockfish/pull/5509 SPSA: A: 6000, alpha: 0.602, gamma: 0.101 1st - 437 feature transformer biases where values are < 25 54k / 120k games at 180+1.8 https://tests.stockfishchess.org/tests/view/66af98ac4ff211be9d4edad0 nn-808259761cca.nnue 2nd - 208 L2 weights where values are zero 112k / 120k games at 180+1.8 https://tests.stockfishchess.org/tests/view/66b0c3074ff211be9d4edbe5 nn-a56cb8c3d477.nnue When creating the above 2 nets (nn-808259761cca.nnue, nn-a56cb8c3d477.nnue), spsa params were unintentionally applied to nn-e8bac1c07a5a.nnue rather than nn-31337bea577c.nnue due to an issue in a script that creates nets by applying spsa results to base nets. Since they both passed STC and were neutral or slightly positive at LTC, they were combined to see if the elo from each set of params was additive. The 2 nets can be merged on top of nn-e8bac1c07a5a.nnue with: https://github.com/linrock/nnue-tools/blob/90942d3/spsa/combine_nnue.py ``` python3 combine_nnue.py \ nn-e8bac1c07a5a.nnue \ nn-808259761cca.nnue \ nn-a56cb8c3d477.nnue ``` Merging yields nn-87caa003fc6a.nnue which was renamed to nn-1111cefa1111.nnue with an updated nnue-namer around 10x faster than before by: - using a prefix trie for efficient prefix matches - modifying 4 non-functional bytes near the end of the file instead of 2 https://github.com/linrock/nnue-namer Thanks to @MinetaS for pointing out in #nnue-dev what the non-functional bytes are: L3 is 32, 4 bytes for biases, 32 bytes for weights. (fc_2) So -38 and -37 are technically -2 and -1 of fc_1 (type AffineTransform<30, 32>) And since InputDimension is padded to 32 there are total 32 of 2 adjacent bytes padding. So yes, it's non-functional whatever values are there. It's possible to tweak bytes at -38 - 32 * N and -37 - 32 * N given N = 0 ... 31 The net renamed with the new method passed non-regression STC vs. the original net: https://tests.stockfishchess.org/tests/view/66c0f0a821503a509c13b332 To print the spsa params with nnue-pytorch: ``` import features from serialize import NNUEReader feature_set = features.get_feature_set_from_name("HalfKAv2_hm") with open("nn-31337bea577c.nnue", "rb") as f: model = NNUEReader(f, feature_set).model c_end = 16 for i,ft_bias in enumerate(model.input.bias.data[:3072]): value = int(ft_bias * 254) if abs(value) < 25: print(f"ftB[{i}],{value},-1024,1024,{c_end},0.0020") c_end = 6 for i in range(8): for j in range(32): for k in range(30): value = int(model.layer_stacks.l2.weight.data[32 * i + j, k] * 64) if value == 0: print(f"twoW[{i}][{j}][{k}],{value},-127,127,{c_end},0.0020") ``` New params found with the same method as: https://github.com/official-stockfish/Stockfish/pull/5459 Passed STC: https://tests.stockfishchess.org/tests/view/66b4d4464ff211be9d4edf6e LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 136416 W: 35753 L: 35283 D: 65380 Elo +1.20 Ptnml(0-2): 510, 16159, 34416, 16597, 526 Passed LTC: https://tests.stockfishchess.org/tests/view/66b76e814ff211be9d4ee1cc LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 159336 W: 40753 L: 40178 D: 78405 Elo +1.25 Ptnml(0-2): 126, 17497, 43864, 18038, 143 closes https://github.com/official-stockfish/Stockfish/pull/5534 bench 1613043 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: FauziAkram
Date: Tue Aug 20 20:57:07 2024 +0200 Timestamp: 1724180227 Simplify cutnode reduction formula Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 137994 W: 34705 L: 34603 D: 68686 Elo +0.26 Ptnml(0-2): 124, 15371, 37903, 15477, 122 https://tests.stockfishchess.org/tests/view/66aeb74b4ff211be9d4eda10 Passed LTC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 131456 W: 34148 L: 34031 D: 63277 Elo +0.31 Ptnml(0-2): 506, 15571, 33465, 15672, 514 https://tests.stockfishchess.org/tests/view/66ae258b4ff211be9d4ed95d closes https://github.com/official-stockfish/Stockfish/pull/5531 Bench: 1261995 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: Tue Aug 20 20:51:39 2024 +0200 Timestamp: 1724179899 Simplify Post-LMR Continuation History Updates Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 55520 W: 14625 L: 14420 D: 26475 Elo +1.28 Ptnml(0-2): 247, 6522, 14007, 6747, 237 https://tests.stockfishchess.org/tests/view/66ad40874ff211be9d4ed8f7 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 216168 W: 54561 L: 54540 D: 107067 Elo +0.03 Ptnml(0-2): 196, 24212, 59244, 24239, 193 https://tests.stockfishchess.org/tests/view/66aeac954ff211be9d4eda03 closes https://github.com/official-stockfish/Stockfish/pull/5530 bench 1418263 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: Tue Aug 20 20:47:46 2024 +0200 Timestamp: 1724179666 Improve Comments for Pairwise Multiplication Optimization closes https://github.com/official-stockfish/Stockfish/pull/5524 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: Tue Aug 20 20:44:55 2024 +0200 Timestamp: 1724179495 Fix failing CI for MacOS 13 GCC 11 closes https://github.com/official-stockfish/Stockfish/pull/5540 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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 Aug 3 09:42:54 2024 +0200 Timestamp: 1722670974 Simplify Cutnode Reduction Passed Non-regression STC: LR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 143968 W: 37439 L: 37333 D: 69196 Elo +0.26 Ptnml(0-2): 521, 17228, 36456, 17182, 597 https://tests.stockfishchess.org/tests/view/66a73f9f4ff211be9d4ed27f Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 198954 W: 50384 L: 50345 D: 98225 Elo +0.07 Ptnml(0-2): 201, 22360, 54347, 22337, 232 https://tests.stockfishchess.org/tests/view/66a906e94ff211be9d4ed423 closes https://github.com/official-stockfish/Stockfish/pull/5526 bench 1277466 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: MinetaS
Date: Sat Aug 3 09:42:03 2024 +0200 Timestamp: 1722670923 Move DotProd code into optimized affine layer This patch moves the DotProd code into the propagation function which has sequential access optimization. To prove the speedup, the comparison is done without the sparse layer. With the sparse layer the effect is marginal (GCC 0.3%, LLVM/Clang 0.1%). For both tests, binary is compiled with GCC 14.1. Each test had 50 runs. Sparse layer included: ``` speedup = +0.0030 P(speedup > 0) = 1.0000 ``` Sparse layer excluded: ``` speedup = +0.0561 P(speedup > 0) = 1.0000 ``` closes https://github.com/official-stockfish/Stockfish/pull/5520 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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 Aug 3 09:41:37 2024 +0200 Timestamp: 1722670897 Replicate network weights only to used NUMA nodes On a system with multiple NUMA nodes, this patch avoids unneeded replicated (e.g. 8x for a single threaded run), reducting memory use in that case. Lazy initialization forced before search. Passed STC: https://tests.stockfishchess.org/tests/view/66a28c524ff211be9d4ecdd4 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 691776 W: 179429 L: 179927 D: 332420 Elo -0.25 Ptnml(0-2): 2573, 79370, 182547, 78778, 2620 closes https://github.com/official-stockfish/Stockfish/pull/5515 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: Sun Jul 28 22:22:50 2024 +0200 Timestamp: 1722198170 Remove Killers The removal of killers on line 1774 resulted in a substantial decrease in pre-LMR history average, so a negative history fill is applied to counter it. Passed Non-regression STC (vs #5513): LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 21984 W: 5886 L: 5645 D: 10453 Elo +3.81 Ptnml(0-2): 80, 2492, 5628, 2691, 101 https://tests.stockfishchess.org/tests/view/66a095894ff211be9d4ecb9d Passed Non-regression LTC (vs #5513): LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 95430 W: 24141 L: 23995 D: 47294 Elo +0.53 Ptnml(0-2): 97, 10537, 26298, 10689, 94 https://tests.stockfishchess.org/tests/view/66a11c8d4ff211be9d4ecbf8 closes https://github.com/official-stockfish/Stockfish/pull/5517 Bench: 1660869 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers 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: Sun Jul 28 22:21:03 2024 +0200 Timestamp: 1722198063 Clean up comments for movepicker Remove references to checks in MovePicker comments. Follow-up for https://github.com/official-stockfish/Stockfish/pull/5498 closes https://github.com/official-stockfish/Stockfish/pull/5516 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Michael Chaly
Date: Sun Jul 28 22:18:33 2024 +0200 Timestamp: 1722197913 Remove unneeded depth tracking in qsearch Since simplification of quiet checks in qsearch this depth isn't used by any function at all apart movepicker, which also doesn't use passed qsearch depth in any way, so can be removed. No functional change. closes https://github.com/official-stockfish/Stockfish/pull/5514 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 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: Sun Jul 28 22:13:47 2024 +0200 Timestamp: 1722197627 Simplify Away Killer Condition in Cutnode LMR Passed Non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 42944 W: 11240 L: 11024 D: 20680 Elo +1.75 Ptnml(0-2): 159, 5056, 10825, 5274, 158 https://tests.stockfishchess.org/tests/view/669c13384ff211be9d4ec69f Passed Non-regression LTC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 163548 W: 41366 L: 41289 D: 80893 Elo +0.16 Ptnml(0-2): 109, 18246, 45007, 18283, 129 https://tests.stockfishchess.org/tests/view/669cb1254ff211be9d4ec73a closes https://github.com/official-stockfish/Stockfish/pull/5513 Bench: 1178570 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: Tue Jul 23 19:34:27 2024 +0200 Timestamp: 1721756067 Update default main net to nn-31337bea577c.nnue Created by updating output weights (256) and biases (8) of the previous main net with values found with spsa around 101k / 120k games at 140+1.4. 264 spsa params: output weights and biases in nn-e8bac1c07a5a.nnue A: 6000, alpha: 0.602, gamma: 0.101 weights: [-127, 127], c_end = 6 biases: [-8192, 8192], c_end = 64 Among the 264 params, 189 weights and all 8 biases were changed. Changes in the weights: - mean: -0.111 +/- 3.57 - range: [-8, 8] Found with the same method as: https://github.com/official-stockfish/Stockfish/pull/5459 Due to the original name (nn-ea8c9128c325.nnue) being too similar to the previous main net (nn-e8bac1c07a5a.nnue) and creating confusion, it was renamed by making non-functional changes to the .nnue file the same way as past nets with: https://github.com/linrock/nnue-namer To verify that bench is the same and view the modified non-functional bytes: ``` echo -e "setoption name EvalFile value nn-ea8c9128c325.nnue\nbench" | ./stockfish echo -e "setoption name EvalFile value nn-31337bea577c.nnue\nbench" | ./stockfish cmp -l nn-ea8c9128c325.nnue nn-31337bea577c.nnue diff <(xxd nn-ea8c9128c325.nnue) <(xxd nn-31337bea577c.nnue) ``` Passed STC: https://tests.stockfishchess.org/tests/view/669564154ff211be9d4ec080 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 57280 W: 15139 L: 14789 D: 27352 Elo +2.12 Ptnml(0-2): 209, 6685, 14522, 6995, 229 Passed LTC: https://tests.stockfishchess.org/tests/view/669694204ff211be9d4ec1b4 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 63030 W: 16093 L: 15720 D: 31217 Elo +2.06 Ptnml(0-2): 47, 6766, 17516, 7139, 47 closes https://github.com/official-stockfish/Stockfish/pull/5509 bench 1371485 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: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Introduce pre-qsearch ttmove extensions at pv nodes The idea is that we are about to dive into qsearch (next search depth is <= 0) but since we have the move in transposition table we should extend that move and evaluate it with more precise search - because branch seems important. Passed STC: https://tests.stockfishchess.org/tests/view/6699d2564ff211be9d4ec488 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 83104 W: 21789 L: 21401 D: 39914 Elo +1.62 Ptnml(0-2): 293, 9748, 21128, 10044, 339 Passed LTC: https://tests.stockfishchess.org/tests/view/669b3f1a4ff211be9d4ec602 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 136098 W: 34636 L: 34111 D: 67351 Elo +1.34 Ptnml(0-2): 105, 14882, 37550, 15407, 105 closes https://github.com/official-stockfish/Stockfish/pull/5512 bench 1526129 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: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Remove Killer Heuristic In Move Ordering Passed Non-regression STC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 80480 W: 20979 L: 20802 D: 38699 Elo +0.76 Ptnml(0-2): 279, 9610, 20337, 9683, 331 https://tests.stockfishchess.org/tests/view/669c12c14ff211be9d4ec69b Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 77988 W: 19788 L: 19624 D: 38576 Elo +0.73 Ptnml(0-2): 66, 8605, 21481, 8783, 59 https://tests.stockfishchess.org/tests/view/669d628a4ff211be9d4ec7a8 closes https://github.com/official-stockfish/Stockfish/pull/5511 bench 1367740 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 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: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Replace simple eval with psqt in re-eval condition As a result, re-eval depends only on smallnet outputs so an extra call to simple eval can be removed. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/669743054ff211be9d4ec232 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 214912 W: 55801 L: 55777 D: 103334 Elo +0.04 Ptnml(0-2): 746, 24597, 56760, 24593, 760 https://github.com/official-stockfish/Stockfish/pull/5501 Bench: 1440277 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Shahin M. Shahin
Date: Tue Jul 23 19:24:00 2024 +0200 Timestamp: 1721755440 Fix TB guard even if beta is below TB range, once we return probcutBeta with beta + 390 we can return wrong TB value, and guard against ttData.value being `VALUE_NONE` closes https://github.com/official-stockfish/Stockfish/pull/5499 bench: 1440277 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: Tue Jul 23 19:23:57 2024 +0200 Timestamp: 1721755437 Adding LowestElo and HighestElo constants These values represent the lowest Elo rating in the skill level calculation, and the highest one, but it's not clear from the code where these values come from other than the comment. This should improve code readability and maintainability. It makes the purpose of the values clear and allows for easy modification if the Elo range for skill level calculation changes in the future. Moved the Skill struct definition from search.cpp to search.h header file to define the Search::Skill struct, making it accessible from other files. closes https://github.com/official-stockfish/Stockfish/pull/5508 No functional change see source |