| 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 Nov 12 12:49:03 2020 +0100 Timestamp: 1605181743 Increase reduction at root when the best move does not change frequently STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 51320 W: 5159 L: 4956 D: 41205 Elo +1.37 Ptnml(0-2): 215, 3897, 17242, 4082, 224 https://tests.stockfishchess.org/tests/view/5faa072367cbf42301d6a767 LTC: LLR: 2.98 (-2.94,2.94) {0.25,1.25} Total: 15952 W: 762 L: 642 D: 14548 Elo +2.61 Ptnml(0-2): 8, 561, 6725, 667, 15 https://tests.stockfishchess.org/tests/view/5faa4c3567cbf42301d6a794 closes https://github.com/official-stockfish/Stockfish/pull/3225 Bench: 3954692 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: Tue Nov 10 18:21:05 2020 +0100 Timestamp: 1605028865 Increase reduction based on the number of best move changes. Thanks to Vizvezdenec for the PvNode idea and also to vondele the !PvNode idea. Passed STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 19120 W: 1998 L: 1839 D: 15283 Elo +2.89 Ptnml(0-2): 76, 1445, 6375, 1572, 92 https://tests.stockfishchess.org/tests/view/5fa8af3e67cbf42301d6a6c9 Passed LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 75584 W: 3454 L: 3205 D: 68925 Elo +1.14 Ptnml(0-2): 54, 2832, 31771, 3081, 54 closes https://github.com/official-stockfish/Stockfish/pull/3224 Bench: 3595418 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: Sun Nov 8 09:15:34 2020 +0100 Timestamp: 1604823334 Qsearch pruning: follow-up This is a follow-up of the recent qsearch pruning patch in https://github.com/official-stockfish/Stockfish/commit/a260c9a8a24a2630a900efc3821000c3481b0c5d We now use the same guard condition (testing that we already have a defense with a score better score than a TB loss) for all pruning heuristics in qsearch(). This allows some pruning when in check, but in a controlled way to ensure that no wrong mate scores appear. Tested with Elo-gaining bounds: STC: LLR: 2.97 (-2.94,2.94) {-0.25,1.25} Total: 22632 W: 2433 L: 2264 D: 17935 Elo +2.59 Ptnml(0-2): 98, 1744, 7487, 1865, 122 https://tests.stockfishchess.org/tests/view/5fa59405936c54e11ec99515 LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 105432 W: 4965 L: 4648 D: 95819 Elo +1.04 Ptnml(0-2): 85, 4110, 44011, 4423, 87 https://tests.stockfishchess.org/tests/view/5fa5b609936c54e11ec9952a closes https://github.com/official-stockfish/Stockfish/pull/3221 Bench: 3578092 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 Nov 8 08:36:16 2020 +0100 Timestamp: 1604820976 Update default net to nn-c3ca321c51c9.nnue Optimization of the net biases of the 32 x 32 layer and the output layer. Tuning of 32 x 32 layer (200k games, 5 seconds TC) https://tests.stockfishchess.org/tests/view/5f9aaf266a2c112b60691c68 STC: LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 41848 W: 4665 L: 4461 D: 32722 Elo +1.69 Ptnml(0-2): 239, 3308, 13659, 3446, 272 https://tests.stockfishchess.org/tests/view/5fa5ef5a936c54e11ec9954f LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 88008 W: 4045 L: 3768 D: 80195 Elo +1.09 Ptnml(0-2): 69, 3339, 36908, 3622, 66 https://tests.stockfishchess.org/tests/view/5fa62a78936c54e11ec99577 closes https://github.com/official-stockfish/Stockfish/pull/3220 Bench: 3649288 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 Nov 7 16:49:49 2020 +0100 Timestamp: 1604764189 AVX-512 for smaller affine and feature transforms. For the feature transformer the code is analogical to AVX2 since there was room for easy adaptation of wider simd registers. For the smaller affine transforms that have 32 byte stride we keep 2 columns in one zmm register. We also unroll more aggressively so that in the end we have to do 16 parallel horizontal additions on ymm slices each consisting of 4 32-bit integers. The slices are embedded in 8 zmm registers. These changes provide about 1.5% speedup for AVX-512 builds. Closes https://github.com/official-stockfish/Stockfish/pull/3218 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: FauziAkram
Date: Sat Nov 7 16:49:49 2020 +0100 Timestamp: 1604764189 Introducing King On File this new concept calculates bonuses/penalties for the king when the king is in a semiopen or open file. Passed STC: LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 44904 W: 9365 L: 9028 D: 26511 Elo +2.61 Ptnml(0-2): 857, 5309, 9841, 5530, 915 https://tests.stockfishchess.org/tests/view/5fa343625d72639a7acef72b Passed LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 60552 W: 8449 L: 8051 D: 44052 Elo +2.28 Ptnml(0-2): 466, 5772, 17481, 6012, 545 https://tests.stockfishchess.org/tests/view/5fa40e365d72639a7acef79e closes https://github.com/official-stockfish/Stockfish/pull/3219 Bench: 3689484 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 Nov 7 16:48:02 2020 +0100 Timestamp: 1604764082 Change handling the special case of a single legal move. Using no searching time in case of a single legal move is not beneficial from a strength point of view, and this special case can be easily removed: STC: LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 22472 W: 2458 L: 2357 D: 17657 Elo +1.56 Ptnml(0-2): 106, 1733, 7453, 1842, 102 https://tests.stockfishchess.org/tests/view/5f926cbc81eda81bd78cb6df LTC: LLR: 2.94 (-2.94,2.94) {-0.75,0.25} Total: 37880 W: 1736 L: 1682 D: 34462 Elo +0.50 Ptnml(0-2): 22, 1392, 16057, 1448, 21 https://tests.stockfishchess.org/tests/view/5f92a26081eda81bd78cb6fe The advantage of using the normal time management for a single legal move is that scores reported for that move are reasonable, not searching leads to artifacts during games (see e.g. https://tcec-chess.com/#div=sf&game=96&season=19) The disadvantage of using normal time management of a single legal move is that thinking times can be unnaturally long, making it 'painful to watch' in online tournaments. This patch uses normal time management, but caps the used time to 500ms. This should lead to reasonable scores, and be hardly perceptible. closes https://github.com/official-stockfish/Stockfish/pull/3195 closes https://github.com/official-stockfish/Stockfish/pull/3183 variant of a patch suggested by SFisGOD 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: Wed Nov 4 19:52:42 2020 +0100 Timestamp: 1604515962 Manually align arrays on the stack as a workaround to issues with overaligned alignas() on stack variables in gcc < 9.3 on windows. closes https://github.com/official-stockfish/Stockfish/pull/3217 fixes #3216 No functional change see source |
| 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: Mon Nov 2 19:41:17 2020 +0100 Timestamp: 1604342477 Fix incorrect pruning in qsearch Only do countermove based pruning in qsearch if we already have a move with a better score than a TB loss. This patch fixes a bug (started as 843a961) that incorrectly prunes moves if in check, and adds an assert to make sure no wrong mate scores are given in the future. It replaces a no-op moveCount check with a check for bestValue. Initially discussed in #3171 and later in #3199, #3198 and #3210. This PR effectively closes #3171 It also likely fixes #3196 where this causes user visible incorrect TB scores, which probably result from these incorrect mate scores. Passed STC and LTC non-regression tests. https://tests.stockfishchess.org/tests/view/5f9ef8dabca9bf35bae7f648 LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 21672 W: 2339 L: 2230 D: 17103 Elo +1.75 Ptnml(0-2): 126, 1689, 7083, 1826, 112 https://tests.stockfishchess.org/tests/view/5f9f0caebca9bf35bae7f666 LLR: 2.97 (-2.94,2.94) {-0.75,0.25} Total: 33152 W: 1551 L: 1485 D: 30116 Elo +0.69 Ptnml(0-2): 27, 1308, 13832, 1390, 19 closes https://github.com/official-stockfish/Stockfish/pull/3214 Bench: 3625915 see source |
| 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: FauziAkram
Date: Mon Nov 2 19:41:17 2020 +0100 Timestamp: 1604342477 Elo Worth in King Danger Adding the EloWorth for each term in King Danger. Should be useful for simplifications, tuning patches, and new ideas. closes https://github.com/official-stockfish/Stockfish/pull/3204 non-functional change see source |
| 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: Mon Nov 2 19:41:17 2020 +0100 Timestamp: 1604342477 Optimize affine transform for SSSE3 and higher targets. A non-functional speedup. Unroll the loops going over the output dimensions in the affine transform layers by a factor of 4 and perform 4 horizontal additions at a time. Instead of doing naive horizontal additions on each vector separately use hadd and shuffling between vectors to reduce the number of instructions by using all lanes for all stages of the horizontal adds. passed STC of the initial version: LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 17808 W: 1914 L: 1756 D: 14138 Elo +3.08 Ptnml(0-2): 76, 1330, 5948, 1460, 90 https://tests.stockfishchess.org/tests/view/5f9d516f6a2c112b60691da3 passed STC of the final version after cleanup: LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 16296 W: 1750 L: 1595 D: 12951 Elo +3.30 Ptnml(0-2): 72, 1192, 5479, 1319, 86 https://tests.stockfishchess.org/tests/view/5f9df5776a2c112b60691de3 closes https://github.com/official-stockfish/Stockfish/pull/3203 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: Sun Nov 1 08:02:40 2020 +0100 Timestamp: 1604214160 Update default net to nn-cb26f10b1fd9.nnue Result of https://tests.stockfishchess.org/tests/view/5f9a06796a2c112b60691c0f tuning. STC LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 53712 W: 5776 L: 5561 D: 42375 Elo +1.39 Ptnml(0-2): 253, 4282, 17604, 4431, 286 https://tests.stockfishchess.org/tests/view/5f9c7bbc6a2c112b60691d4d LTC LLR: 2.97 (-2.94,2.94) {0.25,1.25} Total: 80184 W: 4007 L: 3739 D: 72438 Elo +1.16 Ptnml(0-2): 58, 3302, 33130, 3518, 84 https://tests.stockfishchess.org/tests/view/5f9d01f06a2c112b60691d87 closes https://github.com/official-stockfish/Stockfish/pull/3209 bench: 3517795 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: syzygy1
Date: Wed Oct 28 23:40:37 2020 +0100 Timestamp: 1603924837 Do not skip non-recapture ttMove when in check The qsearch() MovePicker incorrectly skips a non-recapture ttMove when in check (if depth <= DEPTH_QS_RECAPTURES). This is clearly not intended and can cause qsearch() to return a mate score when there is no mate. Introduced in cad300c and 6596f0e, as observed by joergoster in #3171 and #3198. This PR fixes the bug by not skipping the non-recapture ttMove when in check. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/5f9867ea6a2c112b60691b10 LLR: 2.98 (-2.94,2.94) {-1.25,0.25} Total: 27112 W: 2943 L: 2842 D: 21327 Elo +1.29 Ptnml(0-2): 127, 2170, 8878, 2237, 144 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/5f9967326a2c112b60691bb0 LLR: 2.99 (-2.94,2.94) {-0.75,0.25} Total: 18392 W: 807 L: 738 D: 16847 Elo +1.30 Ptnml(0-2): 9, 655, 7802, 718, 12 closes https://github.com/official-stockfish/Stockfish/pull/3199 closes https://github.com/official-stockfish/Stockfish/pull/3198 Bench: 3870606 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: Wed Oct 28 08:13:34 2020 +0100 Timestamp: 1603869214 Update default net to nn-2eb2e0707c2b.nnue Optimization of the net weights of the 32 x 32 layer (1024 parameters) and net biases of the 512 x 32 layer (32 parameters) using SPSA. Tuning of 32 x 32 Layer (800,000 games, 5 seconds time control): https://tests.stockfishchess.org/tests/view/5f942040d3978d7e86f1aa05 Tuning of 512 x 32 Layer (80,000 games, 20 seconds time control): https://tests.stockfishchess.org/tests/view/5f8f926d2c92c7fe3a8c608b STC: LLR: 2.96 (-2.94,2.94) {-0.25,1.25} Total: 17336 W: 1918 L: 1754 D: 13664 Elo +3.29 Ptnml(0-2): 79, 1344, 5672, 1480, 93 https://tests.stockfishchess.org/tests/view/5f9882346a2c112b60691b34 LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 37304 W: 1822 L: 1651 D: 33831 Elo +1.59 Ptnml(0-2): 27, 1461, 15501, 1640, 23 https://tests.stockfishchess.org/tests/view/5f98a4b36a2c112b60691b40 closes https://github.com/official-stockfish/Stockfish/pull/3201 Bench: 3403528 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: FauziAkram
Date: Wed Oct 28 08:11:29 2020 +0100 Timestamp: 1603869089 Bishop Pawns based on Files Passed STC: https://tests.stockfishchess.org/tests/view/5f8cc8145a4eacb45305da3c LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 132544 W: 27795 L: 27328 D: 77421 Elo +1.22 Ptnml(0-2): 2756, 15558, 29272, 15835, 2851 Passed LTC: https://tests.stockfishchess.org/tests/view/5f8df614bacb75a4f9a4721e LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 169608 W: 23257 L: 22622 D: 123729 Elo +1.30 Ptnml(0-2): 1408, 16316, 48758, 16877, 1445 closes https://github.com/official-stockfish/Stockfish/pull/3194 Bench: 4067106 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: syzygy1
Date: Thu Oct 22 20:50:16 2020 +0200 Timestamp: 1603392616 More incremental accumulator updates This patch was inspired by c065abd which updates the accumulator, if possible, based on the accumulator of two plies back if the accumulator of the preceding ply is not available. With this patch we look back even further in the position history in an attempt to reduce the number of complete recomputations. When we find a usable accumulator for the position N plies back, we also update the accumulator of the position N-1 plies back because that accumulator is most likely to be helpful later when evaluating positions in sibling branches. By not updating all intermediate accumulators immediately, we avoid doing too much work that is not certain to be useful. Overall, roughly 2-3% speedup. This patch makes the code more specific to the net architecture, changing input features of the net will require additional changes to the incremental update code as discussed in the PR #3193 and #3191. Passed STC: https://tests.stockfishchess.org/tests/view/5f9056712c92c7fe3a8c60d0 LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 10040 W: 1116 L: 968 D: 7956 Elo +5.12 Ptnml(0-2): 42, 722, 3365, 828, 63 closes https://github.com/official-stockfish/Stockfish/pull/3193 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: Thu Oct 22 20:18:12 2020 +0200 Timestamp: 1603390692 Add net as dependency of config cleaner output and error message if the server is down and the net is not available. closes https://github.com/official-stockfish/Stockfish/pull/3188 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 Oct 22 20:08:15 2020 +0200 Timestamp: 1603390095 Reduce big time spikes by reducing PV re-searches. Save time by reducing PV re-searches above original depth. Instead use 5% extra time on every move. STC 10+0.1 th 1 : LLR: 2.93 (-2.94,2.94) {-0.25,1.25} Total: 90688 W: 9702 L: 9436 D: 71550 Elo +1.02 Ptnml(0-2): 408, 7252, 29792, 7450, 442 https://tests.stockfishchess.org/tests/view/5f8df807bacb75a4f9a47223 LTC 60+0.6 th 1 : LLR: 2.97 (-2.94,2.94) {0.25,1.25} Total: 97856 W: 4602 L: 4303 D: 88951 Elo +1.06 Ptnml(0-2): 53, 3757, 41057, 3960, 101 https://tests.stockfishchess.org/tests/view/5f8ec4872c92c7fe3a8c602d closes https://github.com/official-stockfish/Stockfish/pull/3192 Bench 3943959 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: Sun Oct 18 13:54:28 2020 +0200 Timestamp: 1603022068 Do more reductions for late quiet moves in case of consecutive fail highs. Idea of this patch can be described as following - in case we have consecutive fail highs and we reach late enough moves at root node probability of remaining quiet moves being able to produce even bigger value than moves that produced previous cutoff (so ones that should be high in move ordering but now they fail to produce beta cutoff because we actually reached high move count) should be quiet small so we can reduce them more. passed STC LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 53392 W: 5681 L: 5474 D: 42237 Elo +1.35 Ptnml(0-2): 214, 4104, 17894, 4229, 255 https://tests.stockfishchess.org/tests/view/5f88501adcdad978fe8c527e passed LTC LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 59136 W: 2773 L: 2564 D: 53799 Elo +1.23 Ptnml(0-2): 30, 2117, 25078, 2300, 43 https://tests.stockfishchess.org/tests/view/5f884dbfdcdad978fe8c527a closes https://github.com/official-stockfish/Stockfish/pull/3184 Bench: 4066972 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: Sun Oct 18 13:43:26 2020 +0200 Timestamp: 1603021406 Update default net to nn-eba324f53044.nnue The new net is based on the previous net 04cf2b4ed1da but with the biases for the 1st hidden layer tuned SPSA, see the SPSA session on fishtest there: https://tests.stockfishchess.org/tests/view/5f875213dcdad978fe8c5211 Thanks to @vondele for writing out the net, see discussion in this thread: https://github.com/mstembera/Stockfish/commit/432da86721647dff1d9426a7cdcfd2dbada8155e Passed STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 15000 W: 1640 L: 1483 D: 11877 Elo +3.64 Ptnml(0-2): 50, 1183, 4908, 1278, 81 https://tests.stockfishchess.org/tests/view/5f8955e20fea1a44ec4f0a5d Passed LTC: LLR: 2.96 (-2.94,2.94) {0.25,1.25} Total: 81272 W: 3948 L: 3682 D: 73642 Elo +1.14 Ptnml(0-2): 64, 3194, 33856, 3456, 66 https://tests.stockfishchess.org/tests/view/5f89e8efeae8a6e60644d6e7 closes https://github.com/official-stockfish/Stockfish/pull/3187 Bench: 3762411 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: Unai Corzo
Date: Wed Oct 14 19:32:12 2020 +0200 Timestamp: 1602696732 Scale factor tweak Add !pawnsOnBothFlanks heuristic to scale factor. STC https://tests.stockfishchess.org/tests/view/5f8080575b3847b5d41f9134 LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 250960 W: 49779 L: 49168 D: 152013 Elo +0.85 Ptnml(0-2): 4224, 28822, 58802, 29383, 4249 LTC https://tests.stockfishchess.org/tests/view/5f832f498ea73fb8ddf83ddb LLR: 2.95 (-2.94,2.94) {0.25,1.25} Total: 88584 W: 11827 L: 11388 D: 65369 Elo +1.72 Ptnml(0-2): 585, 8079, 26578, 8412, 638 closes https://github.com/official-stockfish/Stockfish/pull/3179 bench: 3834252 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: FauziAkram
Date: Wed Oct 14 19:29:22 2020 +0200 Timestamp: 1602696562 RookOnQueenFile Removal Removing Rook On Queen File looks beneficial, and it might even bring some ELO. I will try to reintroduce it with a different method later on. Passed STC: https://tests.stockfishchess.org/tests/view/5f7cea204389873867eb10cb LLR: 2.94 (-2.94,2.94) {-1.25,0.25} Total: 18624 W: 3800 L: 3568 D: 11256 Elo +4.33 Ptnml(0-2): 308, 2131, 4257, 2253, 363 Passed LTC: https://tests.stockfishchess.org/tests/view/5f7d76a4e936c6892bf50598 LLR: 2.95 (-2.94,2.94) {-0.75,0.25} Total: 117864 W: 15515 L: 15340 D: 87009 Elo +0.52 Ptnml(0-2): 926, 11127, 34671, 11262, 946 closes https://github.com/official-stockfish/Stockfish/pull/3176 Bench: 3756191 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: Wed Oct 14 13:28:21 2020 +0200 Timestamp: 1602674901 Update default net to nn-04cf2b4ed1da.nnue Further tune the net parameters, now the last but one layer (32x32). To limit the number of parameters optimized, the network layer was decomposed using SVD, and the singular values were treated as parameters and tuned. Tuning branch: https://github.com/vondele/Stockfish/tree/svdTune Tuner: https://github.com/vondele/nevergrad4sf passed STC: https://tests.stockfishchess.org/tests/view/5f83e82f8ea73fb8ddf83e4e LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 8488 W: 944 L: 795 D: 6749 Elo +6.10 Ptnml(0-2): 39, 609, 2811, 734, 51 passed LTC: https://tests.stockfishchess.org/tests/view/5f83f4118ea73fb8ddf83e66 LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 169016 W: 8043 L: 7589 D: 153384 Elo +0.93 Ptnml(0-2): 133, 6623, 70538, 7085, 129 closes https://github.com/official-stockfish/Stockfish/pull/3181 Bench: 3945198 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: FauziAkram
Date: Mon Oct 5 19:01:46 2020 +0200 Timestamp: 1601917306 Pawn Tuning Tuning of pawns, for classical evaluation: Passed STC: https://tests.stockfishchess.org/tests/view/5f771f0e52560f5fc78559ec LLR: 2.96 (-2.94,2.94) {-0.25,1.25} Total: 252696 W: 50321 L: 49692 D: 152683 Elo +0.86 Ptnml(0-2): 4614, 29845, 57049, 29978, 4862 Passed LTC: https://tests.stockfishchess.org/tests/view/5f77cfef090dcf9aaa16d38b LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 48184 W: 6556 L: 6193 D: 35435 Elo +2.62 Ptnml(0-2): 335, 4516, 14100, 4733, 408 closes https://github.com/official-stockfish/Stockfish/pull/3169 bench: 4016121 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: Unai Corzo
Date: Mon Oct 5 18:59:02 2020 +0200 Timestamp: 1601917142 Simplify away futility pruning for captures Remove futility pruning for captures. STC https://tests.stockfishchess.org/tests/view/5f749bfed930428c36d34c56 LLR: 2.94 (-2.94,2.94) {-1.25,0.25} Total: 38064 W: 4011 L: 3929 D: 30124 Elo +0.75 Ptnml(0-2): 192, 3004, 12567, 3068, 201 LTC https://tests.stockfishchess.org/tests/view/5f74d99bf18675b1ce2f7412 LLR: 2.94 (-2.94,2.94) {-0.75,0.25} Total: 184984 W: 8567 L: 8610 D: 167807 Elo -0.08 Ptnml(0-2): 146, 7593, 77058, 7548, 147 closes https://github.com/official-stockfish/Stockfish/pull/3166 bench: 3890648 see source |