| 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 Jun 13 09:39:03 2021 +0200 Timestamp: 1623569943 Read NNUE net faster Load feature transformer weights in bulk on little-endian machines. This is in particular useful to test new nets with c-chess-cli, see https://github.com/lucasart/c-chess-cli/issues/44 ``` $ time ./stockfish.exe uci Before : 0m0.914s After : 0m0.483s ``` 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 Jun 11 20:33:24 2021 +0200 Timestamp: 1623436404 Limit double extensions Double extensions can lead to search explosions, for specific positions. Currently, however, these double extensions are worth about 10Elo and cannot be removed. This patch instead limits the number of double extensions given to a maximum of 3. This fixes https://github.com/official-stockfish/Stockfish/issues/3532 where the following testcase was shown to be problematic: ``` uci setoption name Hash value 4 setoption name Contempt value 0 ucinewgame position fen 8/Pk6/8/1p6/8/P1K5/8/6B1 w - - 37 130 go depth 20 ``` passed STC: https://tests.stockfishchess.org/tests/view/60c13161457376eb8bcaaa0f LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 73256 W: 6114 L: 6062 D: 61080 Elo +0.25 Ptnml(0-2): 222, 4912, 26306, 4968, 220 passed LTC: https://tests.stockfishchess.org/tests/view/60c196fb457376eb8bcaaa6b LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 166440 W: 5559 L: 5594 D: 155287 Elo -0.07 Ptnml(0-2): 106, 4921, 73197, 4894, 102 closes https://github.com/official-stockfish/Stockfish/pull/3544 Bench: 5067605 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: Tue Jun 8 20:16:20 2021 +0200 Timestamp: 1623176180 Simplify promotion move generator This patch removes Knight promotion checks from Captures. As a consequence, it also removes this underpromotion from qsearch. STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 37776 W: 3113 L: 3023 D: 31640 Elo +0.83 Ptnml(0-2): 103, 2419, 13755, 2507, 104 https://tests.stockfishchess.org/tests/view/60be6a06457376eb8bcaa775 LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 39760 W: 1257 L: 1203 D: 37300 Elo +0.47 Ptnml(0-2): 11, 1079, 17646, 1133, 11 https://tests.stockfishchess.org/tests/view/60beb972457376eb8bcaa7c5 closes https://github.com/official-stockfish/Stockfish/pull/3536 Bench: 5530620 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 Jun 6 21:22:39 2021 +0200 Timestamp: 1623007359 Reduce in LMR reduction on PvNode reduce reduction in LMR by 1 on PvNode. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 266080 W: 22438 L: 21996 D: 221646 Elo +0.58 Ptnml(0-2): 774, 17874, 95376, 18168, 848 https://tests.stockfishchess.org/tests/view/60bc0661457376eb8bcaa4bb LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 20144 W: 698 L: 587 D: 18859 Elo +1.91 Ptnml(0-2): 2, 529, 8906, 626, 9 https://tests.stockfishchess.org/tests/view/60bcc3f2457376eb8bcaa58d closes https://github.com/official-stockfish/Stockfish/pull/3534 bench: 5173012 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: Guy Vreuls
Date: Sat Jun 5 11:38:28 2021 +0200 Timestamp: 1622885908 Makefile: Extend sanitize support Enable compiling with multiple sanitizers at once. Syntax: make build ARCH=x86-64-avx512 debug=on sanitize="address undefined" closes https://github.com/official-stockfish/Stockfish/pull/3524 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: Sat Jun 5 10:55:57 2021 +0200 Timestamp: 1622883357 Enhance CI to error on leaks Add flags to valgrind in our Continuous Integration scripts, to error on memory leaks. closes https://github.com/official-stockfish/Stockfish/pull/3525 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: Guy Vreuls
Date: Sat Jun 5 10:47:46 2021 +0200 Timestamp: 1622882866 Revert "Simplify En Passant" This reverts commit 9f8058bd26df1c3ca37b85f811026f1eb82e6524. Fixes the memory leak discussed in pull request #3523 https://github.com/official-stockfish/Stockfish/pull/3523 Passed non-regression STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 76184 W: 6330 L: 6282 D: 63572 Elo +0.22 Ptnml(0-2): 202, 5047, 27564, 5059, 220 https://tests.stockfishchess.org/tests/view/60ba146c457376eb8bcaa2e2 closes https://github.com/official-stockfish/Stockfish/pull/3527 Benched to verify there is no functional change. Bench: 4364128 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: Stéphane Nicolet
Date: Fri Jun 4 14:07:46 2021 +0200 Timestamp: 1622808466 Clean SIMD code a bit Cleaner vector code structure in feature transformer. This patch just regroups the parts of the inner loop for each SIMD instruction set. Tested for non-regression: LLR: 2.96 (-2.94,2.94) <-2.50,0.50> Total: 115760 W: 9835 L: 9831 D: 96094 Elo +0.01 Ptnml(0-2): 326, 7776, 41715, 7694, 369 https://tests.stockfishchess.org/tests/view/60b96b39457376eb8bcaa26e It would be nice if a future patch could use some of the macros at the top of the file to unify the code between the distincts SIMD instruction sets (of course, unifying the Relu will be the challenge). closes https://github.com/official-stockfish/Stockfish/pull/3506 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: Stéphane Nicolet
Date: Fri Jun 4 01:32:11 2021 +0200 Timestamp: 1622763131 Makefile: better "make clean" for Windows Make clean should be really clean on Windows. Fixes issue https://github.com/official-stockfish/Stockfish/issues/3291 Closes https://github.com/official-stockfish/Stockfish/pull/3517 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: Fri Jun 4 01:23:49 2021 +0200 Timestamp: 1622762629 Introducing NodeType Root We transform rootNode into constexpr by adding a new NodeType `Root`, which causes a speed up. Local test: ``` Build Tester: 1.4.7.0 Windows 10 (Version 10.0, Build 0, 64-bit Edition) Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz SafeMode: No Running In VM: No HyperThreading Enabled: Yes CPU Warmup: Yes Command Line: bench Tests per Build: 25 ANOVA: n/a Engine# (NPS) Speedup Sp Conf. 95% S.S. patch (920.179,4) ---> master (906.329,2) ---> 1,528% 20.336,5 Yes No ``` --------- STC: LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 98216 W: 8348 L: 8102 D: 81766 Elo +0.87 Ptnml(0-2): 295, 6357, 35549, 6621, 286 https://tests.stockfishchess.org/tests/view/60b797e2457376eb8bcaa0ab Yellow LTC: LLR: -2.95 (-2.94,2.94) <0.50,3.50> Total: 76936 W: 2651 L: 2626 D: 71659 Elo +0.11 Ptnml(0-2): 29, 2233, 33916, 2264, 26 https://tests.stockfishchess.org/tests/view/60b80d6d457376eb8bcaa145 closes https://github.com/official-stockfish/Stockfish/pull/3522 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: xoto10
Date: Thu Jun 3 21:22:56 2021 +0200 Timestamp: 1622748176 Make extra time for bestMoveInstability dependent on rootdepth. This change allocates more base time to moves and makes the additional time added for best move instability dependent on rootdepth. STC 10+0.1 : LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 19432 W: 1711 L: 1553 D: 16168 Elo +2.83 Ptnml(0-2): 47, 1250, 6989, 1358, 72 https://tests.stockfishchess.org/tests/view/60b8cd41457376eb8bcaa1ad LTC 60+0.6 : LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 22480 W: 810 L: 693 D: 20977 Elo +1.81 Ptnml(0-2): 9, 603, 9902, 714, 12 https://tests.stockfishchess.org/tests/view/60b8e5bf457376eb8bcaa1e6 closes https://github.com/official-stockfish/Stockfish/pull/3526 Bench 4364128 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 Jun 3 16:25:44 2021 +0200 Timestamp: 1622730344 Update default net to nn-7e66505906a6.nnue Trained with pytorch using the master branch and recommended settings, the data used is the previous 64B binpack enhanced with a 2B binpack generated using an opening book of positions for with the static eval is significantly different from d9 search. book : https://drive.google.com/file/d/1rHcKY5rv34kwku6g89OhnE8Bkfq3UWau/view?usp=sharing book generation: https://github.com/vondele/Stockfish/commit/3ce43ab0c4ce09c1fc5bca5ca27a248e67fddd24 binpack : https://drive.google.com/file/d/1rHcKY5rv34kwku6g89OhnE8Bkfq3UWau/view?usp=sharing ------- Data generation command: generate_training_data depth 9 count 31250000 random_multi_pv 2 random_multi_pv_diff 100 random_move_max_ply 8 random_move_count 3 set_recommended_uci_options eval_limit 32000 output_file_name output.binpack book wrongNNUE.epd seed ${RANDOM}${RANDOM} Training command: python train.py ../../all_d9_fishd9_d8_d10_wrong_shuffle.binpack ../../all_d9_fishd9_d8_d10_wrong_shuffle.binpack --gpus 1 --threads 2 --num-workers 2 --batch-size 16384 --progress_bar_refresh_rate 300 --smart-fen-skipping --random-fen-skipping 3 --features=HalfKAv2^ --lambda=1.0 --max_epochs=400 --seed $RANDOM --default_root_dir exp/run_5 ------- passed STC: https://tests.stockfishchess.org/tests/view/60b7c79a457376eb8bcaa104 LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 64592 W: 6254 L: 6028 D: 52310 Elo +1.22 Ptnml(0-2): 255, 4785, 22020, 4951, 285 passed LTC: https://tests.stockfishchess.org/tests/view/60b85307457376eb8bcaa182 LLR: 2.96 (-2.94,2.94) <0.50,3.50> Total: 45560 W: 1998 L: 1826 D: 41736 Elo +1.31 Ptnml(0-2): 36, 1604, 19335, 1762, 43 closes https://github.com/official-stockfish/Stockfish/pull/3521 Bench: 4364128 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: Stéphane Nicolet
Date: Wed Jun 2 08:37:00 2021 +0200 Timestamp: 1622615820 Typography change for bench 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 Jun 1 23:21:00 2021 +0200 Timestamp: 1622582460 Remove formerPV variable. STC: LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 75672 W: 6546 L: 6496 D: 62630 Elo +0.23 Ptnml(0-2): 238, 5274, 26761, 5326, 237 https://tests.stockfishchess.org/tests/view/60b349c0ec0c03148cbed055 LTC: LLR: 2.98 (-2.94,2.94) <-2.50,0.50> Total: 137816 W: 4676 L: 4689 D: 128451 Elo -0.03 Ptnml(0-2): 52, 4237, 60354, 4202, 63 https://tests.stockfishchess.org/tests/view/60b38970ec0c03148cbed075 closes https://github.com/official-stockfish/Stockfish/pull/3515 Bench: 4892288 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: J. Oster
Date: Tue Jun 1 21:25:28 2021 +0200 Timestamp: 1622575528 Pre-initialize ss->ply We pre-initialize ss->ply over the whole stack. There is no need to re-assign the same value(s) over and over again while searching. Probably a tiny speedup on longer searches. Tested for no regression: STC LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 25784 W: 2205 L: 2101 D: 21478 Elo +1.40 Ptnml(0-2): 62, 1660, 9368, 1716, 86 https://tests.stockfishchess.org/tests/view/60b516c6457376eb8bca9dfa LTC LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 26200 W: 944 L: 878 D: 24378 Elo +0.88 Ptnml(0-2): 12, 732, 11545, 800, 11 https://tests.stockfishchess.org/tests/view/60b53652457376eb8bca9e0e closes https://github.com/official-stockfish/Stockfish/pull/3516 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: candirufish
Date: Mon May 31 18:31:32 2021 +0200 Timestamp: 1622478692 Check Extension with Static Evaluation extension for checking moves, at higher depth and more decisive positions. stc: LLR: 2.97 (-2.94,2.94) <-0.50,2.50> Total: 87008 W: 7337 L: 7100 D: 72571 Elo +0.95 Ptnml(0-2): 264, 5737, 31270, 5964, 269 https://tests.stockfishchess.org/tests/view/60b1034787a1a67ae56c47b6 ltc: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 79320 W: 2629 L: 2432 D: 74259 Elo +0.86 Ptnml(0-2): 29, 2205, 35000, 2392, 34 https://tests.stockfishchess.org/tests/view/60b1ae0b87a1a67ae56c487c closes https://github.com/official-stockfish/Stockfish/pull/3514 Bench: 4447112 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 May 30 21:31:58 2021 +0200 Timestamp: 1622403118 Fix export of the feature transformer. PSQT export was missing. fixes #3507 closes https://github.com/official-stockfish/Stockfish/pull/3508 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: Sun May 30 21:30:15 2021 +0200 Timestamp: 1622403015 Simplify NNUE / classical evaluation selection for the new network architecture these rules can be simplified, closer to the original PSQT difference based again. passed STC LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 22656 W: 1979 L: 1868 D: 18809 Elo +1.70 Ptnml(0-2): 70, 1496, 8087, 1603, 72 https://tests.stockfishchess.org/tests/view/60b24579db3c4776cb89d122 passed LTC LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 30224 W: 1015 L: 953 D: 28256 Elo +0.71 Ptnml(0-2): 4, 860, 13330, 906, 12 https://tests.stockfishchess.org/tests/view/60b27613db3c4776cb89d145 closes https://github.com/official-stockfish/Stockfish/pull/3511 Bench: 3937626 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 May 28 20:16:11 2021 +0200 Timestamp: 1622225771 Remove Stat Reset at beta cutoff STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 63936 W: 5350 L: 5288 D: 53298 Elo +0.34 Ptnml(0-2): 184, 4295, 22954, 4345, 190 https://tests.stockfishchess.org/tests/view/60affb4c12066fd299795c64 LTC: LLR: 2.96 (-2.94,2.94) <-2.50,0.50> Total: 35856 W: 1201 L: 1142 D: 33513 Elo +0.57 Ptnml(0-2): 7, 1031, 15795, 1086, 9 https://tests.stockfishchess.org/tests/view/60b0537812066fd299795cc6 closes https://github.com/official-stockfish/Stockfish/pull/3505 bench: 3831936 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: Stéphane Nicolet
Date: Thu May 27 01:21:56 2021 +0200 Timestamp: 1622071316 Do not use lazy evaluation inside NNUE This simplification patch implements two changes: 1. it simplifies away the so-called "lazy" path in the NNUE evaluation internals, where we trusted the psqt head alone to avoid the costly "positional" head in some cases; 2. it raises a little bit the NNUEThreshold1 in evaluate.cpp (from 682 to 800), which increases the limit where we switched from NNUE eval to Classical eval. Both effects increase the number of positional evaluations done by our new net architecture, but the results of our tests below seem to indicate that the loss of speed will be compensated by the gain of eval quality. STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 26280 W: 2244 L: 2137 D: 21899 Elo +1.41 Ptnml(0-2): 72, 1755, 9405, 1810, 98 https://tests.stockfishchess.org/tests/view/60ae73f112066fd299795a51 LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 20592 W: 750 L: 677 D: 19165 Elo +1.23 Ptnml(0-2): 9, 614, 8980, 681, 12 https://tests.stockfishchess.org/tests/view/60ae88e812066fd299795a82 closes https://github.com/official-stockfish/Stockfish/pull/3503 Bench: 3817907 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: Wed May 26 17:32:54 2021 +0200 Timestamp: 1622043174 Less reduction for capture/promotions. Exclude captures/promotions at expected cut nodes (which also not a former PV node) from LMR if a response to the first previous opponent move. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 288656 W: 24886 L: 24413 D: 239357 Elo +0.57 Ptnml(0-2): 900, 19738, 102578, 20213, 899 https://tests.stockfishchess.org/tests/view/60ad505112066fd29979595b LTC: LLR: 2.97 (-2.94,2.94) <0.50,3.50> Total: 31344 W: 1107 L: 975 D: 29262 Elo +1.46 Ptnml(0-2): 12, 879, 13757, 1013, 11 https://tests.stockfishchess.org/tests/view/60adffce12066fd2997959d2 closes https://github.com/official-stockfish/Stockfish/pull/3500 Bench: 3827710 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: IIvec
Date: Wed May 26 17:25:05 2021 +0200 Timestamp: 1622042705 Simplify the thread term for reduction formula Dependance on Threads.size() was removed Search::init() for the Reductions[] initialization. STC: LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 17376 W: 1024 L: 929 D: 15423 Elo +1.90 Ptnml(0-2): 24, 781, 6989, 864, 30 https://tests.stockfishchess.org/tests/view/60ac110812066fd2997957dc LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 145552 W: 3656 L: 3673 D: 138223 Elo -0.04 Ptnml(0-2): 37, 3351, 66014, 3340, 34 https://tests.stockfishchess.org/tests/view/60ac267412066fd299795825 closes https://github.com/official-stockfish/Stockfish/pull/3502 Bench 3864295 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: Tue May 25 21:40:51 2021 +0200 Timestamp: 1621971651 Expose the lazy threshold for the feature transformer PSQT as a parameter. Definition of the lazy threshold moved to evaluate.cpp where all others are. Lazy threshold only used for real searches, not used for the "eval" call. This preserves the purity of NNUE evaluation, which is useful to verify consistency between the engine and the NNUE trainer. closes https://github.com/official-stockfish/Stockfish/pull/3499 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: Mon May 24 15:52:22 2021 +0200 Timestamp: 1621864342 Increased reduction for captures in LMR It now does, in LMR, an increased on reduction by 1 for captures in cut nodes. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 30656 W: 2565 L: 2397 D: 25694 Elo +1.90 Ptnml(0-2): 63, 2012, 11029, 2142, 82 https://tests.stockfishchess.org/tests/view/60a96733ce8ea25a3ef04178 LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 124840 W: 4139 L: 3878 D: 116823 Elo +0.73 Ptnml(0-2): 48, 3480, 55100, 3747, 45 https://tests.stockfishchess.org/tests/view/60a995f5ce8ea25a3ef041b7 closes https://github.com/official-stockfish/Stockfish/pull/3494 bench: 3864295 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: Stéphane Nicolet
Date: Sat May 22 21:09:22 2021 +0200 Timestamp: 1621710562 Sometimes change the (materialist, positional) balance Our new nets output two values for the side to move in the last layer. We can interpret the first value as a material evaluation of the position, and the second one as the dynamic, positional value of the location of pieces. This patch changes the balance for the (materialist, positional) parts of the score from (128, 128) to (121, 135) when the piece material is equal between the two players, but keeps the standard (128, 128) balance when one player is at least an exchange up. Passed STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 15936 W: 1421 L: 1266 D: 13249 Elo +3.38 Ptnml(0-2): 37, 1037, 5694, 1134, 66 https://tests.stockfishchess.org/tests/view/60a82df9ce8ea25a3ef0408f Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 13904 W: 516 L: 410 D: 12978 Elo +2.65 Ptnml(0-2): 4, 374, 6088, 484, 2 https://tests.stockfishchess.org/tests/view/60a8bbf9ce8ea25a3ef04101 closes https://github.com/official-stockfish/Stockfish/pull/3492 Bench: 3856635 see source |