| 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: Wed Apr 28 13:58:46 2021 +0200 Timestamp: 1619611126 Change tempo with time and threads Introduce variable tempo for nnue depending on logarithm of estimated strength, where strength is the product of time and number of threads. The original idea here was that NNUE is best with a slightly different tempo value to classical, since its style of play is slightly different. It turns out that the best tempo for NNUE varies with strength of play, so a formula is used which gives about 19 for STC and 24 for LTC under current fishtest settings. STC 10+0.1: LLR: 2.94 (-2.94,2.94) {-0.20,1.10} Total: 120816 W: 11155 L: 10861 D: 98800 Elo +0.85 Ptnml(0-2): 406, 8728, 41933, 8848, 493 https://tests.stockfishchess.org/tests/view/60735b3a8141753378960534 LTC 60+0.6: LLR: 2.94 (-2.94,2.94) {0.20,0.90} Total: 35688 W: 1392 L: 1234 D: 33062 Elo +1.54 Ptnml(0-2): 23, 1079, 15473, 1255, 14 https://tests.stockfishchess.org/tests/view/6073ffbc814175337896057f Passed non-regression SMP test at LTC 20+0.2 (8 threads): LLR: 2.95 (-2.94,2.94) {-0.70,0.20} Total: 11008 W: 317 L: 267 D: 10424 Elo +1.58 Ptnml(0-2): 2, 245, 4962, 291, 4 https://tests.stockfishchess.org/tests/view/60749ea881417533789605a4 closes https://github.com/official-stockfish/Stockfish/pull/3426 Bench 4075325 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: Wed Apr 28 13:38:28 2021 +0200 Timestamp: 1619609908 Simplify pawn moves generator This patch simplifies QUIET_CHECKS pawn move generator by merging discovery check move generator with direct check move generator. It also simplifies emptySquares instantiation. In addition, I added a comment in generate_moves() to clarify Check branches. STC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 112648 W: 9952 L: 9945 D: 92751 Elo +0.02 Ptnml(0-2): 369, 7682, 40195, 7729, 349 https://tests.stockfishchess.org/tests/view/6088226895e7f1852abd2978 LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 74656 W: 2797 L: 2765 D: 69094 Elo +0.15 Ptnml(0-2): 38, 2328, 32554, 2380, 28 https://tests.stockfishchess.org/tests/view/60884e5095e7f1852abd2994 closes https://github.com/official-stockfish/Stockfish/pull/3447 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: lonfom169
Date: Sun Apr 25 13:26:22 2021 +0200 Timestamp: 1619349982 More extensions if SE search is very low. More extensions for non-PV nodes if value from singular extension search is significantly below singularBeta. Passed STC: LLR: 2.97 (-2.94,2.94) <-0.50,2.50> Total: 25064 W: 2334 L: 2162 D: 20568 Elo +2.38 Ptnml(0-2): 82, 1720, 8768, 1868, 94 https://tests.stockfishchess.org/tests/view/6084ba7995e7f1852abd27e3 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 67136 W: 2644 L: 2450 D: 62042 Elo +1.00 Ptnml(0-2): 46, 2134, 28990, 2376, 22 https://tests.stockfishchess.org/tests/view/6084d79195e7f1852abd27ee closes https://github.com/official-stockfish/Stockfish/pull/3445 Bench: 4075325 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: Sun Apr 25 13:21:57 2021 +0200 Timestamp: 1619349717 Thread based reduction tweak. For PV nodes at the first two plies no reductions are done for each fourth thread. STC (8 threads): LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 53992 W: 3334 L: 3167 D: 47491 Elo +1.07 Ptnml(0-2): 64, 2713, 21285, 2860, 74 https://tests.stockfishchess.org/tests/view/6083b2d695e7f1852abd277a LTC (8 threads): LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 64888 W: 1888 L: 1725 D: 61275 Elo +0.87 Ptnml(0-2): 14, 1556, 29146, 1709, 19 https://tests.stockfishchess.org/tests/view/6084249595e7f1852abd2795 closes https://github.com/official-stockfish/Stockfish/pull/3443 No functional change (for one thread) 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 Apr 25 13:16:30 2021 +0200 Timestamp: 1619349390 Cleanup and simplify NNUE code. A lot of optimizations happend since the NNUE was introduced and since then some parts of the code were left unused. This got to the point where asserts were have to be made just to let people know that modifying something will not have any effects or may even break everything due to the assumptions being made. Removing these parts removes those inexisting "false dependencies". Additionally: * append_changed_indices now takes the king pos and stateinfo explicitly, no more misleading pos parameter * IndexList is removed in favor of a generic ValueList. Feature transformer just instantiates the type it needs. * The update cost and refresh requirement is deferred to the feature set once again, but now doesn't go through the whole FeatureSet machinery and just calls HalfKP directly. * accumulator no longer has a singular dimension. * The PS constants and the PieceSquareIndex array are made local to the HalfKP feature set because they are specific to it and DO differ for other feature sets. * A few names are changed to more descriptive Passed STC non-regression: https://tests.stockfishchess.org/tests/view/608421dd95e7f1852abd2790 LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 180008 W: 16186 L: 16258 D: 147564 Elo -0.14 Ptnml(0-2): 587, 12593, 63725, 12503, 596 closes https://github.com/official-stockfish/Stockfish/pull/3441 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: Sat Apr 24 12:55:33 2021 +0200 Timestamp: 1619261733 Merge all move generators Merging `generate<EVASIONS>` and `generate<QUIET_CHECKS>` into `generate_all()`. verified to yield correct perft results, even though bench changes due to different order of generated moves. No regresion playing games: passed STC: LLR: 2.94 (-2.94,2.94) {-1.00,0.20} Total: 161800 W: 14585 L: 14624 D: 132591 Elo -0.08 Ptnml(0-2): 577, 11681, 56451, 11586, 605 https://tests.stockfishchess.org/tests/view/606532732b2df919fd5f026d passed LTC: LLR: 2.98 (-2.94,2.94) {-0.70,0.20} Total: 188504 W: 6906 L: 6961 D: 174637 Elo -0.10 Ptnml(0-2): 87, 6272, 81610, 6175, 108 https://tests.stockfishchess.org/tests/view/6065b0772b2df919fd5f02ae closes https://github.com/official-stockfish/Stockfish/pull/3418 Bench: 4536129 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: Sat Apr 24 12:49:29 2021 +0200 Timestamp: 1619261369 Unify naming convention of the NNUE code matches the rest of the stockfish code base closes https://github.com/official-stockfish/Stockfish/pull/3437 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: dsmsgms
Date: Thu Apr 15 12:45:39 2021 +0200 Timestamp: 1618483539 Use classical eval for Bishop vs Pawns NNUE evaluation is incapable of recognizing trivially drawn bishop endgames (the wrong-colored rook pawn), which are in fact ubiquitous and stock standard in chess analysis. Switching off NNUE evaluation in KBPs vs KPs endgames is a measure that stops Stockfish from trading down to a drawn version of these endings when we presumably have advantage. The patch is able to edge over master in endgame positions. Patch tested for Elo gain with the "endgame.epd" book, and verified for non-regression with our usual book (see the pull request for details). STC: LLR: 2.93 (-2.94,2.94) {-0.20,1.10} Total: 33232 W: 6655 L: 6497 D: 20080 Elo +1.65 Ptnml(0-2): 4, 2342, 11769, 2494, 7 https://tests.stockfishchess.org/tests/view/6074a52981417533789605b8 LTC: LLR: 2.93 (-2.94,2.94) {0.20,0.90} Total: 159056 W: 29799 L: 29378 D: 99879 Elo +0.92 Ptnml(0-2): 7, 9004, 61085, 9425, 7 https://tests.stockfishchess.org/tests/view/6074c39a81417533789605ca Closes https://github.com/official-stockfish/Stockfish/pull/3427 Bench: 4503918 blah 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: Thu Apr 15 12:21:30 2021 +0200 Timestamp: 1618482090 Documentation patch: AppendChangedIndices Clarify the assumptions on the position passed to the AppendChangedIndices(). Closes https://github.com/official-stockfish/Stockfish/pull/3428 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: Vizvezdenec
Date: Thu Apr 15 11:41:30 2021 +0200 Timestamp: 1618479690 Simplification: last capture extension The code for last capture extension can be removed in current master. Passed STC LLR: 2.95 (-2.94,2.94) {-1.00,0.20} Total: 85024 W: 7754 L: 7707 D: 69563 Elo +0.19 Ptnml(0-2): 293, 5991, 29914, 6004, 310 https://tests.stockfishchess.org/tests/view/607690f1814175337896068f Passed LTC LLR: 2.96 (-2.94,2.94) {-0.70,0.20} Total: 39880 W: 1503 L: 1453 D: 36924 Elo +0.44 Ptnml(0-2): 17, 1281, 17293, 1333, 16 https://tests.stockfishchess.org/tests/view/6076ccbe814175337896069e Closes https://github.com/official-stockfish/Stockfish/pull/3430 Bench: 4202264 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 Apr 15 11:19:44 2021 +0200 Timestamp: 1618478384 Revert previous patch Revert the previous patch about move generation, as it unexpectedly changed the bench. Better to take the time to understand the issue. Bench: 4191632 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: Thu Apr 15 10:53:51 2021 +0200 Timestamp: 1618476831 Merge all move generators Merging `generate<EVASIONS>` and `generate<QUIET_CHECKS>` into `generate_all()`. STC: LLR: 2.94 (-2.94,2.94) {-1.00,0.20} Total: 161800 W: 14585 L: 14624 D: 132591 Elo -0.08 Ptnml(0-2): 577, 11681, 56451, 11586, 605 https://tests.stockfishchess.org/tests/view/606532732b2df919fd5f026d LTC: LLR: 2.98 (-2.94,2.94) {-0.70,0.20} Total: 188504 W: 6906 L: 6961 D: 174637 Elo -0.10 Ptnml(0-2): 87, 6272, 81610, 6175, 108 https://tests.stockfishchess.org/tests/view/6065b0772b2df919fd5f02ae ------------ Verified for correctness of `EVASIONS` by running perft: ``` ./stockfish b3nch 16 1 6 default perft (replace 3 by e in b3nch) Nodes searched : 71608931810 ``` Also tested for correctness on Chess960 with a similar code shown here: https://github.com/official-stockfish/Stockfish/pull/3418#issuecomment-816630295 ``` ./stockfish b3nch 16 1 6 fischer.txt perft Nodes searched : 506736009395 ``` ------------ Closes https://github.com/official-stockfish/Stockfish/pull/3418 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: Vizvezdenec
Date: Tue Apr 6 18:23:35 2021 +0200 Timestamp: 1617726215 Replace distanceFromPv with a better logic This patch removes the recently introduced distanceFromPv logic, and replaces it with following logic: if reduction of moves with low movecount is really negative, we search them deeper than the first move. passed STC: LLR: 2.95 (-2.94,2.94) {-0.20,1.10} Total: 153008 W: 13913 L: 13579 D: 125516 Elo +0.76 Ptnml(0-2): 547, 10811, 53470, 11113, 563 https://tests.stockfishchess.org/tests/view/6069c9d02b2df919fd5f04d2 passed LTC: LLR: 2.94 (-2.94,2.94) {0.20,0.90} Total: 101920 W: 3964 L: 3699 D: 94257 Elo +0.90 Ptnml(0-2): 55, 3279, 44019, 3560, 47 https://tests.stockfishchess.org/tests/view/606a99fd2b2df919fd5f0532 Closes https://github.com/official-stockfish/Stockfish/pull/3421 Bench: 4191632 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: Tue Apr 6 09:07:20 2021 +0200 Timestamp: 1617692840 Keep more pawns This patch increases the weight of pawns in the scale factor applied to the output of the NNUE evaluation. This has the effect that Stockfish will try a little bit harder to keep more pawns in position where the engine has the advantage, and exchange more pawns in bad positions. STC: LLR: 2.93 (-2.94,2.94) {-0.20,1.10} Total: 42552 W: 3858 L: 3668 D: 35026 Elo +1.55 Ptnml(0-2): 152, 2956, 14876, 3134, 158 https://tests.stockfishchess.org/tests/view/606a06dd2b2df919fd5f0504 LTC: LLR: 2.95 (-2.94,2.94) {0.20,0.90} Total: 44328 W: 1703 L: 1531 D: 41094 Elo +1.35 Ptnml(0-2): 20, 1373, 19207, 1543, 21 https://tests.stockfishchess.org/tests/view/606aa4ec2b2df919fd5f053e Closes https://github.com/official-stockfish/Stockfish/pull/3420 Bench: 4310076 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 Mar 31 08:12:25 2021 +0200 Timestamp: 1617171145 Small clean-up Bench: 4321677 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: Wed Mar 31 07:47:15 2021 +0200 Timestamp: 1617169635 Simplify King Evasion Simplify away the removal of some illegal `KING`-evasion moves during move generation. Verified for correctness by running perft on the following positions: ``` ./stockfish bench 16 1 6 default perft Nodes searched: 71608931810 ./stockfish position fen 4rrk1/1p1nq3/p7/2p1P1pp/3P2bp/3Q1Bn1/PPPB4/1K2R1NR w - - 40 21 go perft 6 Nodes searched: 6136386434 ``` Passed STC: LLR: 2.94 (-2.94,2.94) {-1.00,0.20} Total: 16072 W: 1473 L: 1349 D: 13250 Elo +2.68 Ptnml(0-2): 57, 1047, 5710, 1159, 63 https://tests.stockfishchess.org/tests/view/60629e7ef183b42957b423b1 Passed LTC: LLR: 2.94 (-2.94,2.94) {-0.70,0.20} Total: 59064 W: 2214 L: 2177 D: 54673 Elo +0.22 Ptnml(0-2): 26, 1944, 25556, 1979, 27 https://tests.stockfishchess.org/tests/view/6062dce4f183b42957b423de closes https://github.com/official-stockfish/Stockfish/pull/3415 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: mstembera
Date: Sat Mar 27 17:03:10 2021 +0100 Timestamp: 1616860990 Simplify and unify FRC cornered bishop. tested locally as fishtest doesn't support FRC: STC NNUE 9646 - 9647 - 20707 [0.500] 40000 -0.0 +/- 2.4, LOS: 49.7 %, DrawRatio: 51.8 % STC classical 9678 - 9609 - 20713 [0.501] 40000 0.6 +/- 2.4, LOS: 69.0 %, DrawRatio: 51.8 % and verified independently: Score of master vs patch: 6463 - 6580 - 34957 [0.499] 48000 closes https://github.com/official-stockfish/Stockfish/pull/3413 bench: 4321677 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: Sat Mar 27 16:56:05 2021 +0100 Timestamp: 1616860565 Allow using Intel SDE for PGO builds. The software development emulator (SDE) allows to run binaries compiled for architectures not supported by the actual CPU. This is useful to do PGO builds for newer architectures. The SDE can currently be obtained from https://software.intel.com/content/www/us/en/develop/articles/intel-software-development-emulator.html This patch introduces a new optional makefile argument SDE_PATH. If not empty it should contain the path to the sde executable closes https://github.com/official-stockfish/Stockfish/pull/3373 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: Wed Mar 24 17:11:06 2021 +0100 Timestamp: 1616602266 Small cleanups (march 2021) With help of @BM123499, @mstembera, @gvreuls, @noobpwnftw and @Fanael Thanks! Closes https://github.com/official-stockfish/Stockfish/pull/3405 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: Fri Mar 19 20:28:57 2021 +0100 Timestamp: 1616182137 Use reference instead of pointer for pop_lsb() signature This patch changes the pop_lsb() signature from Square pop_lsb(Bitboard*) to Square pop_lsb(Bitboard&). This is more idomatic for C++ style signatures. Passed a non-regression STC test: LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 21280 W: 1928 L: 1847 D: 17505 Elo +1.32 Ptnml(0-2): 71, 1427, 7558, 1518, 66 https://tests.stockfishchess.org/tests/view/6053a1e22433018de7a38e2f We have verified that the generated binary is identical on gcc-10. Closes https://github.com/official-stockfish/Stockfish/pull/3404 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: Vizvezdenec
Date: Fri Mar 19 11:58:17 2021 +0100 Timestamp: 1616151497 Add a specific FRC correction from classical to NNUE our net currently is not trained on FRC games, and so doesn't know about the important pattern of a bishop that is cornered in FRC. This patch introduces a term we have in the classical evaluation for this case, and adds it to the NNUE eval. Since fishtest doesn't support FRC right now, the patch was tested locally at STC conditions, starting from the book of FRC starting positions. Score of master vs patch: 993 - 2226 - 6781 [0.438] 10000 Which corresponds to approximately 40 Elo The patch passes non-regression testing for traditional chess (where it adds one branch). passed STC: https://tests.stockfishchess.org/tests/view/604fa2532433018de7a38b67 LLR: 2.95 (-2.94,2.94) {-1.25,0.25} Total: 30560 W: 2701 L: 2636 D: 25223 Elo +0.74 Ptnml(0-2): 88, 2056, 10921, 2133, 82 passed STC also in an earlier version: https://tests.stockfishchess.org/tests/view/604f61282433018de7a38b4d closes https://github.com/official-stockfish/Stockfish/pull/3398 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: Thu Mar 18 00:21:41 2021 +0100 Timestamp: 1616023301 Change definition of between_bb() We remark that in current master, most of our use cases for between_bb() can be optimized if the second parameter of the function is added to the segment. So we change the definition of between_bb(s1, s2) such that it excludes s1 but includes s2. We also use a precomputed array for between_bb() for another small speed gain (see https://tests.stockfishchess.org/tests/view/604d09f72433018de7a389fb). Passed STC: LLR: 2.96 (-2.94,2.94) {-0.25,1.25} Total: 18736 W: 1746 L: 1607 D: 15383 Elo +2.58 Ptnml(0-2): 61, 1226, 6644, 1387, 50 https://tests.stockfishchess.org/tests/view/60428c84ddcba5f0627bb6e4 Yellow LTC: LTC: LLR: -3.00 (-2.94,2.94) {0.25,1.25} Total: 39144 W: 1431 L: 1413 D: 36300 Elo +0.16 Ptnml(0-2): 13, 1176, 17184, 1178, 21 https://tests.stockfishchess.org/tests/view/605128702433018de7a38ca1 Closes https://github.com/official-stockfish/Stockfish/pull/3397 --------- Verified for correctness by running perft on the following position: ./stockfish position fen 4rrk1/1p1nq3/p7/2p1P1pp/3P2bp/3Q1Bn1/PPPB4/1K2R1NR w - - 40 21 go perft 6 Nodes searched: 6136386434 -------- 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: Vizvezdenec
Date: Wed Mar 17 10:34:02 2021 +0100 Timestamp: 1615973642 Remove advanced_pawn_push() Continuation of work by @topologist: we now do futility pruning and movecount pruning in qsearch() for pawn pushes up to the 7th rank. So the condition to avoid the pruning is if the move is a promotion or not. This allows to get rid of the advanced_pawn_push() function in position.h alltogether. Passed STC https://tests.stockfishchess.org/tests/view/6048c5842433018de7a387e6 LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 34424 W: 3081 L: 3015 D: 28328 Elo +0.67 Ptnml(0-2): 110, 2442, 12052, 2488, 120 Passed LTC https://tests.stockfishchess.org/tests/view/6048f7d22433018de7a387f0 LLR: 2.94 (-2.94,2.94) {-0.75,0.25} Total: 142024 W: 5170 L: 5202 D: 131652 Elo -0.08 Ptnml(0-2): 50, 4678, 61613, 4596, 75 Closes https://github.com/official-stockfish/Stockfish/pull/3390 Bench: 4339126 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 Mar 16 22:34:23 2021 +0100 Timestamp: 1615930463 Simplify move generation (2/2) STC: LLR: 2.97 (-2.94,2.94) {-1.25,0.25} Total: 39352 W: 3551 L: 3493 D: 32308 Elo +0.51 Ptnml(0-2): 143, 2695, 13928, 2781, 129 https://tests.stockfishchess.org/tests/view/6050007a2433018de7a38bbb LTC: LLR: 2.96 (-2.94,2.94) {-0.75,0.25} Total: 44944 W: 1629 L: 1596 D: 41719 Elo +0.26 Ptnml(0-2): 22, 1319, 19762, 1342, 27 https://tests.stockfishchess.org/tests/view/60500e892433018de7a38bc4 Closes https://github.com/official-stockfish/Stockfish/pull/3399 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: Tue Mar 16 22:32:53 2021 +0100 Timestamp: 1615930373 Simplify move generation (1/2) STC: LLR: 2.95 (-2.94,2.94) {-1.25,0.25} Total: 29792 W: 2611 L: 2545 D: 24636 Elo +0.77 Ptnml(0-2): 94, 1982, 10659, 2086, 75 https://tests.stockfishchess.org/tests/view/604fe5b62433018de7a38ba8 LTC: LLR: 2.92 (-2.94,2.94) {-0.75,0.25} Total: 22040 W: 826 L: 777 D: 20437 Elo +0.77 Ptnml(0-2): 8, 646, 9664, 693, 9 https://tests.stockfishchess.org/tests/view/604fec892433018de7a38bac Closes https://github.com/official-stockfish/Stockfish/pull/3399 No functional change see source |