| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 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 Sep 10 11:50:43 2021 +0200 Timestamp: 1631267443 Decrease depth for cutnodes with no tt move By analogy to existing logic of decreasing depth for PvNodes w/o tt move do the same for cutNodes. Passed STC https://tests.stockfishchess.org/tests/view/613abf5a689039fce12e1155 LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 90336 W: 23108 L: 22804 D: 44424 Elo +1.17 Ptnml(0-2): 286, 10316, 23642, 10656, 268 Passed LTC https://tests.stockfishchess.org/tests/view/613ae330689039fce12e1172 LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 37736 W: 9607 L: 9346 D: 18783 Elo +2.40 Ptnml(0-2): 21, 3917, 10730, 4180, 20 closes https://github.com/official-stockfish/Stockfish/pull/3697 bench 5891181 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stefan Geschwentner
Date: Tue Sep 7 19:59:14 2021 +0200 Timestamp: 1631037554 Further improve history updates Now even double history updates if a search failed low at an expected PV or CUT node. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 30736 W: 7891 L: 7674 D: 15171 Elo +2.45 Ptnml(0-2): 90, 3477, 8017, 3694, 90 https://tests.stockfishchess.org/tests/view/61364ae30cd98ab40c0c9da5 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 73600 W: 18684 L: 18326 D: 36590 Elo +1.69 Ptnml(0-2): 41, 7734, 20899, 8078, 48 https://tests.stockfishchess.org/tests/view/6136940f0cd98ab40c0c9df3 closes https://github.com/official-stockfish/Stockfish/pull/3694 Bench: 6030657 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 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: Mon Sep 6 14:19:47 2021 +0200 Timestamp: 1630930787 Improve history updates If a search failed low at an expected PV or CUT node do greater history updates. STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 95112 W: 24293 L: 23982 D: 46837 Elo +1.14 Ptnml(0-2): 285, 10893, 24906, 11170, 302 https://tests.stockfishchess.org/tests/view/6132aa1a2ffb3c36aceb926f LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 116352 W: 29450 L: 28975 D: 57927 Elo +1.42 Ptnml(0-2): 93, 12263, 32984, 12748, 88 https://tests.stockfishchess.org/tests/view/613394d12ffb3c36aceb92f4 closes https://github.com/official-stockfish/Stockfish/pull/3693 Bench: 6130736 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Mon Sep 6 14:08:22 2021 +0200 Timestamp: 1630930102 Update default net to nn-6762d36ad265.nnue SPSA 1: https://tests.stockfishchess.org/tests/view/612cdb1fbb4956d8b78eb5ab Parameters: A total of 256 net biases were tuned (hidden layer 2) Base net: nn-fe433fd8c7f6.nnue New net: nn-5f134823db04.nnue SPSA 2: https://tests.stockfishchess.org/tests/view/612fcde645091e810014af19 Parameters: A total of 64 net biases were tuned (hidden layer 1) Base net: nn-5f134823db04.nnue New net: nn-8eca5dd4e3f7.nnue SPSA 3: https://tests.stockfishchess.org/tests/view/6130822345091e810014af61 Parameters: 256 net weights and 8 net biases (output layer) Base net: nn-8eca5dd4e3f7.nnue New net: nn-4556108e4f00.nnue SPSA 4: https://tests.stockfishchess.org/tests/view/613287652ffb3c36aceb923c Parameters: A total of 256 net biases were tuned (hidden layer 2) Base net: nn-4556108e4f00.nnue New net: nn-6762d36ad265.nnue STC: LLR: 2.96 (-2.94,2.94) <-0.50,2.50> Total: 162776 W: 41220 L: 40807 D: 80749 Elo +0.88 Ptnml(0-2): 517, 18800, 42359, 19177, 535 https://tests.stockfishchess.org/tests/view/6134107125b9b35584838559 LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.50> Total: 41056 W: 10428 L: 10156 D: 20472 Elo +2.30 Ptnml(0-2): 30, 4288, 11618, 4564, 28 https://tests.stockfishchess.org/tests/view/6134ad6525b9b3558483857a closes https://github.com/official-stockfish/Stockfish/pull/3691 Bench: 5812158 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 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 Sep 6 13:59:17 2021 +0200 Timestamp: 1630929557 Extend captures and promotions This patch introduces extension for captures and promotions. Every capture or promotion that is not the first move in the list gets extended at PvNodes and cutNodes. Special thanks to @locutus2 - all my previous attepmts that failed on this idea were done only for PvNodes - idea to include also cutNodes was based on his latest passed patch. STC https://tests.stockfishchess.org/tests/view/6134abf325b9b35584838574 LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 188920 W: 47754 L: 47304 D: 93862 Elo +0.83 Ptnml(0-2): 595, 21754, 49344, 22140, 627 LTC https://tests.stockfishchess.org/tests/view/613521de25b9b355848385d7 LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 8768 W: 2283 L: 2098 D: 4387 Elo +7.33 Ptnml(0-2): 7, 866, 2452, 1053, 6 closes https://github.com/official-stockfish/Stockfish/pull/3692 bench: 5564555 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Tue Aug 31 12:56:19 2021 +0200 Timestamp: 1630407379 Update default net to nn-735bba95dec0.nnue SPSA 1: https://tests.stockfishchess.org/tests/view/61286d8b62d20cf82b5ad1bd Parameters: A total of 256 net biases were tuned (hidden layer 2) Base net: nn-33495fe25081.nnue New net: nn-83e3cf2af92b.nnue SPSA 2: https://tests.stockfishchess.org/tests/view/6129cf2162d20cf82b5ad25f Parameters: A total of 64 net biases were tuned (hidden layer 1) Base net: nn-83e3cf2af92b.nnue New net: nn-69a528eaef35.nnue SPSA 3: https://tests.stockfishchess.org/tests/view/612a0dcb62d20cf82b5ad2a0 Parameters: 256 net weights and 8 net biases (output layer) Base net: nn-69a528eaef35.nnue New net: nn-735bba95dec0.nnue STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 95144 W: 24310 L: 23999 D: 46835 Elo +1.14 Ptnml(0-2): 232, 11059, 24748, 11232, 301 https://tests.stockfishchess.org/tests/view/612bb3be0fdf40644b4b9996 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 33632 W: 8522 L: 8271 D: 16839 Elo +2.59 Ptnml(0-2): 18, 3511, 9516, 3744, 27 https://tests.stockfishchess.org/tests/view/612ce5b9bb4956d8b78eb5b3 Closes https://github.com/official-stockfish/Stockfish/pull/3685 Bench: 5600615 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: VoyagerOne
Date: Fri Aug 27 21:41:32 2021 +0200 Timestamp: 1630093292 CMH Pruning Tweak Tweak pruning formula by adding up CMH values. STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 14608 W: 3837 L: 3641 D: 7130 Elo +4.66 Ptnml(0-2): 27, 1681, 3723, 1815, 58 https://tests.stockfishchess.org/tests/view/612792f362d20cf82b5ad156 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 53520 W: 13580 L: 13276 D: 26664 Elo +1.97 Ptnml(0-2): 28, 5610, 15183, 5908, 31 https://tests.stockfishchess.org/tests/view/6127d27062d20cf82b5ad191 closes https://github.com/official-stockfish/Stockfish/pull/3682 Bench: 5186641 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Fri Aug 27 07:51:26 2021 +0200 Timestamp: 1630043486 Update default net to nn-33495fe25081.nnue STC: LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 37368 W: 9621 L: 9391 D: 18356 Elo +2.14 Ptnml(0-2): 117, 4287, 9664, 4481, 135 https://tests.stockfishchess.org/tests/view/612768165318138ee1204977 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 13328 W: 3446 L: 3246 D: 6636 Elo +5.21 Ptnml(0-2): 11, 1383, 3682, 1571, 17 https://tests.stockfishchess.org/tests/view/6127dc8d62d20cf82b5ad196 Closes https://github.com/official-stockfish/Stockfish/pull/3679 Bench: 5179347 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: ppigazzini
Date: Fri Aug 27 07:49:26 2021 +0200 Timestamp: 1630043366 Use "pedantic" flag also for mingw This will avoid to run in fishtest a test where the linux machines exit from the building process and only the windows machines run the test. See: https://tests.stockfishchess.org/tests/view/61122d732a8a49ac5be79996 https://github.com/SFisGOD/Stockfish/commit/4e422577d6ebd1f6ecf606189190b8f6fb03f6c9#comments closes https://github.com/official-stockfish/Stockfish/pull/3671 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 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Fri Aug 27 07:48:18 2021 +0200 Timestamp: 1630043298 Fix empty EvalFile option some GUIs send an empty string for EvalFile, in that case explicitly try the default name fixes https://github.com/official-stockfish/Stockfish/issues/3675 closes https://github.com/official-stockfish/Stockfish/pull/3678 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 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: bmc4
Date: Sun Aug 22 09:15:19 2021 +0200 Timestamp: 1629616519 Simplify Declaration on Pawn Move Generation Removes possible micro-optimization in favor of readability. STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 75432 W: 5824 L: 5777 D: 63831 Elo +0.22 Ptnml(0-2): 178, 4648, 28036, 4657, 197 https://tests.stockfishchess.org/tests/view/611fa7f84977aa1525c9cb75 LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 41200 W: 1156 L: 1106 D: 38938 Elo +0.42 Ptnml(0-2): 13, 981, 18562, 1031, 13 https://tests.stockfishchess.org/tests/view/611fcc694977aa1525c9cb9b Closes https://github.com/official-stockfish/Stockfish/pull/3669 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 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Sun Aug 22 09:09:58 2021 +0200 Timestamp: 1629616198 Update default net to nn-517c4f68b5df.nnue SPSA: https://tests.stockfishchess.org/tests/view/611cf0da4977aa1525c9ca03 Parameters: 256 net weights and 8 net biases (output layer) Base net: nn-ac5605a608d6.nnue New net: nn-517c4f68b5df.nnue STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 11600 W: 998 L: 851 D: 9751 Elo +4.40 Ptnml(0-2): 30, 705, 4186, 846, 33 https://tests.stockfishchess.org/tests/view/611f84524977aa1525c9cb5b LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.50> Total: 9360 W: 338 L: 243 D: 8779 Elo +3.53 Ptnml(0-2): 0, 220, 4151, 303, 6 https://tests.stockfishchess.org/tests/view/611f8c5b4977aa1525c9cb64 closes https://github.com/official-stockfish/Stockfish/pull/3667 Bench: 4844618 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: candirufish
Date: Sun Aug 22 09:05:53 2021 +0200 Timestamp: 1629615953 do more LMR extensions for PV nodes LMR Pv and depth 6 Extension tweak: LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 52488 W: 1542 L: 1394 D: 49552 Elo +0.98 Ptnml(0-2): 18, 1253, 23552, 1405, 16 https://tests.stockfishchess.org/tests/view/611e49c34977aa1525c9caa7 STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 76216 W: 6000 L: 5784 D: 64432 Elo +0.98 Ptnml(0-2): 204, 4745, 28006, 4937, 216 https://tests.stockfishchess.org/tests/view/611e0e254977aa1525c9ca89 closes https://github.com/official-stockfish/Stockfish/pull/3666 Bench: 5046381 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: bmc4
Date: Sun Aug 22 09:00:15 2021 +0200 Timestamp: 1629615615 Simplify Null Move Search Reduction slightly simpler formula for reduction computation. first round of tests: STC: LLR: 2.97 (-2.94,2.94) <-2.50,0.50> Total: 15632 W: 1319 L: 1204 D: 13109 Elo +2.56 Ptnml(0-2): 33, 956, 5733, 1051, 43 https://tests.stockfishchess.org/tests/view/60bd03c7457376eb8bcaa600 LTC: LLR: 3.37 (-2.94,2.94) <-2.50,0.50> Total: 86296 W: 2814 L: 2779 D: 80703 Elo +0.14 Ptnml(0-2): 33, 2500, 38039, 2551, 25 https://tests.stockfishchess.org/tests/view/60bd1ff0457376eb8bcaa653 recent tests: STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 23936 W: 1895 L: 1793 D: 20248 Elo +1.48 Ptnml(0-2): 40, 1470, 8869, 1526, 63 https://tests.stockfishchess.org/tests/view/611f9b7d4977aa1525c9cb6b LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 62568 W: 1750 L: 1713 D: 59105 Elo +0.21 Ptnml(0-2): 19, 1560, 28085, 1605, 15 https://tests.stockfishchess.org/tests/view/611fa4814977aa1525c9cb71 functional on high depth closes https://github.com/official-stockfish/Stockfish/pull/3535 Bench: 5375286 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 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: Fri Aug 20 08:50:25 2021 +0200 Timestamp: 1629442225 Optimize and tidy up affine transform code. The new network caused some issues initially due to the very narrow neuron set between the first two FC layers. Necessary changes were hacked together to make it work. This patch is a mature approach to make the affine transform code faster, more readable, and easier to maintain should the layer sizes change again. The following changes were made: * ClippedReLU always produces a multiple of 32 outputs. This is about as good of a solution for AffineTransform's SIMD requirements as it can get without a bigger rewrite. * All self-contained simd helpers are moved to a separate file (simd.h). Inline asm is utilized to work around GCC's issues with code generation and register assignment. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101693, https://godbolt.org/z/da76fY1n7 * AffineTransform has 2 specializations. While it's more lines of code due to the boilerplate, the logic in both is significantly reduced, as these two are impossible to nicely combine into one. 1) The first specialization is for cases when there's >=128 inputs. It uses a different approach to perform the affine transform and can make full use of AVX512 without any edge cases. Furthermore, it has higher theoretical throughput because less loads are needed in the hot path, requiring only a fixed amount of instructions for horizontal additions at the end, which are amortized by the large number of inputs. 2) The second specialization is made to handle smaller layers where performance is still necessary but edge cases need to be handled. AVX512 implementation for this was ommited by mistake, a remnant from the temporary implementation for the new... This could be easily reintroduced if needed. A slightly more detailed description of both implementations is in the code. Overall it should be a minor speedup, as shown on fishtest: passed STC: LLR: 2.96 (-2.94,2.94) <-0.50,2.50> Total: 51520 W: 4074 L: 3888 D: 43558 Elo +1.25 Ptnml(0-2): 111, 3136, 19097, 3288, 128 and various tests shown in the pull request closes https://github.com/official-stockfish/Stockfish/pull/3663 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 Windows 32 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: Fri Aug 20 07:57:09 2021 +0200 Timestamp: 1629439029 Improve handling of the debug log file. Fix handling of empty strings in uci options and reassigning of the log file Fixes https://github.com/official-stockfish/Stockfish/issues/3650 Closes https://github.com/official-stockfish/Stockfish/pull/3655 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 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Torsten Hellwig
Date: Wed Aug 18 09:17:22 2021 +0200 Timestamp: 1629271042 Update default net to nn-ac5605a608d6.nnue This net was created with the nnue-pytorch trainer, it used the previous master net as a starting point. The training data includes all T60 data (https://drive.google.com/drive/folders/1rzZkgIgw7G5vQMLr2hZNiUXOp7z80613), all T74 data (https://drive.google.com/drive/folders/1aFUv3Ih3-A8Vxw9064Kw_FU4sNhMHZU-) and the wrongNNUE_02_d9.binpack (https://drive.google.com/file/d/1seGNOqcVdvK_vPNq98j-zV3XPE5zWAeq). The Leela data were randomly named and then concatenated. All data was merged into one binpack using interleave_binpacks.py. python3 train.py \ ../data/t60_t74_wrong.binpack \ ../data/t60_t74_wrong.binpack \ --resume-from-model ../data/nn-e8321e467bf6.pt \ --gpus 1 \ --threads 4 \ --num-workers 1 \ --batch-size 16384 \ --progress_bar_refresh_rate 300 \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --lambda=1.0 \ --max_epochs=600 \ --seed $RANDOM \ --default_root_dir ../output/exp_24 STC: LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 15320 W: 1415 L: 1257 D: 12648 Elo +3.58 Ptnml(0-2): 50, 1002, 5402, 1152, 54 https://tests.stockfishchess.org/tests/view/611c404a4977aa1525c9c97f LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 9440 W: 345 L: 248 D: 8847 Elo +3.57 Ptnml(0-2): 3, 222, 4175, 315, 5 https://tests.stockfishchess.org/tests/view/611c6c7d4977aa1525c9c996 LTC with UHO_XXL_+0.90_+1.19.epd: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 6232 W: 1638 L: 1459 D: 3135 Elo +9.98 Ptnml(0-2): 5, 592, 1744, 769, 6 https://tests.stockfishchess.org/tests/view/611c9b214977aa1525c9c9cb closes https://github.com/official-stockfish/Stockfish/pull/3664 Bench: 5375286 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Tue Aug 17 21:08:34 2021 +0200 Timestamp: 1629227314 Regenerate dependencies on code change fixes https://github.com/official-stockfish/Stockfish/issues/3658 dependencies are now regenerated for each code change, this adds some 1s overhead in compile time, but avoids potential miscompilations or build problems. closes https://github.com/official-stockfish/Stockfish/pull/3659 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 Windows 32 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: Sun Aug 15 12:05:43 2021 +0200 Timestamp: 1629021943 New NNUE architecture and net Introduces a new NNUE network architecture and associated network parameters The summary of the changes: * Position for each perspective mirrored such that the king is on e..h files. Cuts the feature transformer size in half, while preserving enough knowledge to be good. See https://docs.google.com/document/d/1gTlrr02qSNKiXNZ_SuO4-RjK4MXBiFlLE6jvNqqMkAY/edit#heading=h.b40q4rb1w7on. * The number of neurons after the feature transformer increased two-fold, to 1024x2. This is possibly mostly due to the now very optimized feature transformer update code. * The number of neurons after the second layer is reduced from 16 to 8, to reduce the speed impact. This, perhaps surprisingly, doesn't harm the strength much. See https://docs.google.com/document/d/1gTlrr02qSNKiXNZ_SuO4-RjK4MXBiFlLE6jvNqqMkAY/edit#heading=h.6qkocr97fezq The AffineTransform code did not work out-of-the box with the smaller number of neurons after the second layer, so some temporary changes have been made to add a special case for InputDimensions == 8. Also additional 0 padding is added to the output for some archs that cannot process inputs by <=8 (SSE2, NEON). VNNI uses an implementation that can keep all outputs in the registers while reducing the number of loads by 3 for each 16 inputs, thanks to the reduced number of output neurons. However GCC is particularily bad at optimization here (and perhaps why the current way the affine transform is done even passed sprt) (see https://docs.google.com/document/d/1gTlrr02qSNKiXNZ_SuO4-RjK4MXBiFlLE6jvNqqMkAY/edit# for details) and more work will be done on this in the following days. I expect the current VNNI implementation to be improved and extended to other architectures. The network was trained with a slightly modified version of the pytorch trainer (https://github.com/glinscott/nnue-pytorch); the changes are in https://github.com/glinscott/nnue-pytorch/pull/143 The training utilized 2 datasets. dataset A - https://drive.google.com/file/d/1VlhnHL8f-20AXhGkILujnNXHwy9T-MQw/view?usp=sharing dataset B - as described in https://github.com/official-stockfish/Stockfish/commit/ba01f4b95448bcb324755f4dd2a632a57c6e67bc The training process was as following: train on dataset A for 350 epochs, take the best net in terms of elo at 20k nodes per move (it's fine to take anything from later stages of training). convert the .ckpt to .pt --resume-from-model from the .pt file, train on dataset B for <600 epochs, take the best net. Lambda=0.8, applied before the loss function. The first training command: python3 train.py \ ../nnue-pytorch-training/data/large_gensfen_multipvdiff_100_d9.binpack \ ../nnue-pytorch-training/data/large_gensfen_multipvdiff_100_d9.binpack \ --gpus "$3," \ --threads 1 \ --num-workers 1 \ --batch-size 16384 \ --progress_bar_refresh_rate 20 \ --smart-fen-skipping \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --lambda=1.0 \ --max_epochs=600 \ --default_root_dir ../nnue-pytorch-training/experiment_$1/run_$2 The second training command: python3 serialize.py \ --features=HalfKAv2_hm^ \ ../nnue-pytorch-training/experiment_131/run_6/default/version_0/checkpoints/epoch-499.ckpt \ ../nnue-pytorch-training/experiment_$1/base/base.pt python3 train.py \ ../nnue-pytorch-training/data/michael_commit_b94a65.binpack \ ../nnue-pytorch-training/data/michael_commit_b94a65.binpack \ --gpus "$3," \ --threads 1 \ --num-workers 1 \ --batch-size 16384 \ --progress_bar_refresh_rate 20 \ --smart-fen-skipping \ --random-fen-skipping 3 \ --features=HalfKAv2_hm^ \ --lambda=0.8 \ --max_epochs=600 \ --resume-from-model ../nnue-pytorch-training/experiment_$1/base/base.pt \ --default_root_dir ../nnue-pytorch-training/experiment_$1/run_$2 STC: https://tests.stockfishchess.org/tests/view/611120b32a8a49ac5be798c4 LLR: 2.97 (-2.94,2.94) <-0.50,2.50> Total: 22480 W: 2434 L: 2251 D: 17795 Elo +2.83 Ptnml(0-2): 101, 1736, 7410, 1865, 128 LTC: https://tests.stockfishchess.org/tests/view/611152b32a8a49ac5be798ea LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 9776 W: 442 L: 333 D: 9001 Elo +3.87 Ptnml(0-2): 5, 295, 4180, 402, 6 closes https://github.com/official-stockfish/Stockfish/pull/3646 bench: 5189338 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Thu Aug 5 16:41:07 2021 +0200 Timestamp: 1628174467 Revert futility pruning patches reverts 09b6d28391cf582d99897360b225bcbbe38dd1c6 and dbd7f602d3c7622df294f87d7239b5aaf31f695f that significantly impact mate finding capabilities. For example on ChestUCI_23102018.epd, at 1M nodes, the number of mates found is nearly reduced 2x without these depth conditions: sf6 2091 sf7 2093 sf8 2107 sf9 2062 sf10 2208 sf11 2552 sf12 2563 sf13 2509 sf14 2427 master 1246 patched 2467 (script for testing at https://github.com/official-stockfish/Stockfish/files/6936412/matecheck.zip) closes https://github.com/official-stockfish/Stockfish/pull/3641 fixes https://github.com/official-stockfish/Stockfish/issues/3627 Bench: 5467570 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: VoyagerOne
Date: Thu Aug 5 16:32:07 2021 +0200 Timestamp: 1628173927 SEE simplification Simplified SEE formula by removing std::min. Should also be easier to tune. STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 22656 W: 1836 L: 1729 D: 19091 Elo +1.64 Ptnml(0-2): 54, 1426, 8267, 1521, 60 https://tests.stockfishchess.org/tests/view/610ae62f2a8a49ac5be79449 LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 26248 W: 806 L: 744 D: 24698 Elo +0.82 Ptnml(0-2): 6, 668, 11715, 728, 7 https://tests.stockfishchess.org/tests/view/610b17ad2a8a49ac5be79466 closes https://github.com/official-stockfish/Stockfish/pull/3643 bench: 4915145 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: SFisGOD
Date: Thu Aug 5 08:52:07 2021 +0200 Timestamp: 1628146327 Update default net to nn-46832cfbead3.nnue SPSA 1: https://tests.stockfishchess.org/tests/view/6100e7f096b86d98abf6a832 Parameters: A total of 256 net weights and 8 net biases were tuned (output layer) Base net: nn-56a5f1c4173a.nnue New net: nn-ec3c8e029926.nnue SPSA 2: https://tests.stockfishchess.org/tests/view/610733caafad2da4f4ae3da7 Parameters: A total of 256 net biases were tuned (hidden layer 2) Base net: nn-ec3c8e029926.nnue New net: nn-46832cfbead3.nnue STC: LLR: 2.98 (-2.94,2.94) <-0.50,2.50> Total: 50520 W: 3953 L: 3765 D: 42802 Elo +1.29 Ptnml(0-2): 138, 3063, 18678, 3235, 146 https://tests.stockfishchess.org/tests/view/610a79692a8a49ac5be793f4 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 57256 W: 1723 L: 1566 D: 53967 Elo +0.95 Ptnml(0-2): 12, 1442, 25568, 1589, 17 https://tests.stockfishchess.org/tests/view/610ac5bb2a8a49ac5be79434 Closes https://github.com/official-stockfish/Stockfish/pull/3642 Bench: 5359314 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 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: Thu Aug 5 08:47:33 2021 +0200 Timestamp: 1628146053 Simplify new cmh pruning thresholds by using directly a quadratic formula. This decouples also the stat bonus updates from the threshold which creates less dependencies for tuning of stat bonus parameters. Perhaps a further fine tuning of the now separated coefficients for constHist[0] and constHist[1] could give further gains. STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 78384 W: 6134 L: 6090 D: 66160 Elo +0.20 Ptnml(0-2): 207, 5013, 28705, 5063, 204 https://tests.stockfishchess.org/tests/view/6106d235afad2da4f4ae3d4b LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 38176 W: 1149 L: 1095 D: 35932 Elo +0.49 Ptnml(0-2): 6, 1000, 17030, 1038, 14 https://tests.stockfishchess.org/tests/view/6107a080afad2da4f4ae3def closes https://github.com/official-stockfish/Stockfish/pull/3639 Bench: 5098146 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: VoyagerOne
Date: Thu Aug 5 08:44:38 2021 +0200 Timestamp: 1628145878 Futile pruning simplification Remove CMH conditions in futile pruning. STC: LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 93520 W: 7165 L: 7138 D: 79217 Elo +0.10 Ptnml(0-2): 222, 5923, 34427, 5982, 206 https://tests.stockfishchess.org/tests/view/61083104e50a153c346ef8df LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 59072 W: 1746 L: 1706 D: 55620 Elo +0.24 Ptnml(0-2): 13, 1562, 26353, 1588, 20 https://tests.stockfishchess.org/tests/view/610894f2e50a153c346ef913 closes https://github.com/official-stockfish/Stockfish/pull/3638 Bench: 5229673 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: VoyagerOne
Date: Sat Jul 31 15:29:19 2021 +0200 Timestamp: 1627738159 CMH Pruning Tweak replace CounterMovePruneThreshold by a depth dependent threshold STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 35512 W: 2718 L: 2552 D: 30242 Elo +1.62 Ptnml(0-2): 66, 2138, 13194, 2280, 78 https://tests.stockfishchess.org/tests/view/6104442fafad2da4f4ae3b94 LTC: LLR: 2.96 (-2.94,2.94) <0.50,3.50> Total: 36536 W: 1150 L: 1019 D: 34367 Elo +1.25 Ptnml(0-2): 10, 920, 16278, 1049, 11 https://tests.stockfishchess.org/tests/view/6104b033afad2da4f4ae3bbc closes https://github.com/official-stockfish/Stockfish/pull/3636 Bench: 5848718 see source |