| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Linmiao Xu
Date: Tue Apr 25 08:19:00 2023 +0200 Timestamp: 1682403540 Update default net to nn-e1fb1ade4432.nnue Created by retraining nn-dabb1ed23026.nnue with a dataset composed of: * The previous best dataset (nn-1ceb1a57d117.nnue dataset) * Adding de-duplicated T80 data from feb2023 and the last 10 days of jan2023, filtered with v6-dd Initially trained with the same options as the recent master net (nn-1ceb1a57d117.nnue). Around epoch 890, training was manually stopped and max epoch increased to 1000. ``` python3 easy_train.py \ --experiment-name leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovjanfebT79aprmayT78jantosepT77dec-v6dd \ --training-dataset /data/leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovjanfebT79aprmayT78jantosepT77dec-v6dd.binpack \ --nnue-pytorch-branch linrock/nnue-pytorch/misc-fixes \ --start-from-engine-test-net True \ --early-fen-skipping 30 \ --start-lambda 1.0 \ --end-lambda 0.7 \ --max_epoch 900 \ --lr 4.375e-4 \ --gamma 0.995 \ --tui False \ --gpus "0," \ --seed $RANDOM ``` The same v6-dd filtering and binpack minimizer was used for preparing the recent nn-1ceb1a57d117.nnue dataset. ``` python3 interleave_binpacks.py \ leela96-filt-v2.binpack \ dfrc99-filt-v2.binpack \ T60-nov2021-12tb7p-eval-filt-v2.binpack \ T60-dec2021-12tb7p-eval-filt-v2.binpack \ filt-v6/test80-aug2022-16tb7p-filter-v6.min-mar2023.binpack \ filt-v6/test80-sep2022-16tb7p-filter-v6.min-mar2023.binpack \ filt-v6-dd/test80-jun2022-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test80-jul2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test80-oct2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test80-nov2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test80-jan2022-3of3-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test80-feb2023-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test79-apr2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test79-may2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test78-jantomay2022-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test78-juntosep2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test77-dec2021-16tb7p-filter-v6-dd.binpack \ /data/leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovjanfebT79aprmayT78jantosepT77dec-v6dd.binpack ``` Links for downloading the training data components can be found at: https://robotmoon.com/nnue-training-data/ Local elo at 25k nodes per move: nn-epoch919.nnue : 2.6 +/- 2.8 Passed STC vs. nn-dabb1ed23026.nnue https://tests.stockfishchess.org/tests/view/644420df94ff3db5625f2af5 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 125960 W: 33898 L: 33464 D: 58598 Elo +1.20 Ptnml(0-2): 351, 13920, 34021, 14320, 368 Passed LTC vs. nn-1ceb1a57d117.nnue https://tests.stockfishchess.org/tests/view/64469f128d30316529b3dc46 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 24544 W: 6817 L: 6542 D: 11185 Elo +3.89 Ptnml(0-2): 8, 2252, 7488, 2505, 19 closes https://github.com/official-stockfish/Stockfish/pull/4546 bench 3714847 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Linmiao Xu
Date: Tue Apr 25 08:17:22 2023 +0200 Timestamp: 1682403442 Created by retraining the master net with these changes to the dataset: * Extending v6 filtering to data from T77 dec2021, T79 may2022, and T80 nov2022 * Reducing the number of duplicate positions, prioritizing position scores seen later in time * Using a binpack minimizer to reduce the overall data size Trained the same way as the previous master net, aside from the dataset changes: ``` python3 easy_train.py \ --experiment-name leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovT79aprmayT78jantosepT77dec-v6dd \ --training-dataset /data/leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovT79aprmayT78jantosepT77dec-v6dd.binpack \ --nnue-pytorch-branch linrock/nnue-pytorch/misc-fixes \ --start-from-engine-test-net True \ --early-fen-skipping 30 \ --start-lambda 1.0 \ --end-lambda 0.7 \ --max_epoch 900 \ --lr 4.375e-4 \ --gamma 0.995 \ --tui False \ --gpus "0," \ --seed $RANDOM ``` The new v6-dd filtering reduces duplicate positions by iterating over hourly data files within leela test runs, starting with the most recent, then keeping positions the first time they're seen and ignoring positions that are seen again. This ordering was done with the assumption that position scores seen later in time are generally more accurate than scores seen earlier in the test run. Positions are de-duplicated based on piece orientations, the first token in fen strings. The binpack minimizer was run with default settings after first merging monthly data into single binpacks. ``` python3 interleave_binpacks.py \ leela96-filt-v2.binpack \ dfrc99-filt-v2.binpack \ T60-nov2021-12tb7p-eval-filt-v2.binpack \ T60-dec2021-12tb7p-eval-filt-v2.binpack \ filt-v6/test80-aug2022-16tb7p-filter-v6.min-mar2023.binpack \ filt-v6/test80-sep2022-16tb7p-filter-v6.min-mar2023.binpack \ filt-v6-dd/test80-jun2022-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test80-jul2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test80-oct2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test80-nov2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test79-apr2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test79-may2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test78-jantomay2022-16tb7p-filter-v6-dd.min-mar2023.binpack \ filt-v6-dd/test78-juntosep2022-16tb7p-filter-v6-dd.binpack \ filt-v6-dd/test77-dec2021-16tb7p-filter-v6-dd.binpack \ /data/leela96-dfrc99-T60novdec-v2-T80augsep-v6-T80junjuloctnovT79aprmayT78jantosepT77dec-v6dd.binpack ``` The code for v6-dd filtering is available along with training data preparation scripts at: https://github.com/linrock/nnue-data Links for downloading the training data components: https://robotmoon.com/nnue-training-data/ The binpack minimizer is from: #4447 Local elo at 25k nodes per move: nn-epoch859.nnue : 1.2 +/- 2.6 Passed STC: https://tests.stockfishchess.org/tests/view/643aad7db08900ff1bc5a832 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 565040 W: 150225 L: 149162 D: 265653 Elo +0.65 Ptnml(0-2): 1875, 62137, 153229, 63608, 1671 Passed LTC: https://tests.stockfishchess.org/tests/view/643ecf2fa43cf30e719d2042 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 1014840 W: 274645 L: 272456 D: 467739 Elo +0.75 Ptnml(0-2): 515, 98565, 306970, 100956, 414 closes https://github.com/official-stockfish/Stockfish/pull/4545 bench 3476305 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Boštjan Mejak
Date: Tue Apr 25 08:08:48 2023 +0200 Timestamp: 1682402928 Update AUTHORS Improved some comments in the AUTHORS file, sort contributors closes https://github.com/official-stockfish/Stockfish/pull/4520 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stefan Geschwentner
Date: Sat Apr 22 11:04:09 2023 +0200 Timestamp: 1682154249 Less reduction for tt move. This idea is a result of my second condition combination tuning for reductions: https://tests.stockfishchess.org/tests/view/643ed5573806eca398f06d61 There were used two parameters per combination: one for the 'sign' of the first and the second condition in a combination. Values >= 50 indicate using a condition directly and values <= -50 means use the negation of a condition. Each condition pair (X,Y) had two occurances dependent of the order of the two conditions: - if X < Y the parameters used for more reduction - if X > Y the parameters used for less reduction - if X = Y then only one condition is present and A[X][X][0]/A[X][X][1] stands for using more/less reduction for only this condition. The parameter pair A[7][2][0] (value = -94.70) and A[7][2][1] (value = 93.60) was one of the strongest signals with values near 100/-100. Here condition nr. 7 was '(ss+1)->cutoffCnt > 3' and condition nr. 2 'move == ttMove'. For condition nr. 7 the negation is used because A[7][2][0] is negative. This translates finally to less reduction (because 7 > 2) for tt moves if child cutoffs <= 3. STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 65728 W: 17704 L: 17358 D: 30666 Elo +1.83 Ptnml(0-2): 184, 7092, 18008, 7354, 226 https://tests.stockfishchess.org/tests/view/643ff767ef2529086a7ed042 LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 139200 W: 37776 L: 37282 D: 64142 Elo +1.23 Ptnml(0-2): 58, 13241, 42509, 13733, 59 https://tests.stockfishchess.org/tests/view/6440bfa9ef2529086a7edbc7 closes https://github.com/official-stockfish/Stockfish/pull/4538 Bench: 3548023 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Muzhen Gaming
Date: Sat Apr 22 10:59:33 2023 +0200 Timestamp: 1682153973 Simplify away depth condition for aspiration window adjust Simplification STC: https://tests.stockfishchess.org/tests/view/64351654596a20f264276ded LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 374664 W: 98942 L: 99089 D: 176633 Elo -0.14 Ptnml(0-2): 1049, 41767, 101878, 41558, 1080 Simplification LTC: https://tests.stockfishchess.org/tests/view/6439499f605991a801b4f684 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 457880 W: 123021 L: 123233 D: 211626 Elo -0.16 Ptnml(0-2): 166, 44739, 139335, 44541, 159 closes https://github.com/official-stockfish/Stockfish/pull/4534 Bench: 3879281 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Guenther Demetz
Date: Sat Apr 22 10:47:51 2023 +0200 Timestamp: 1682153271 Simplification of SEE verification logic Use same logic for all handled pieces. Don't prune the move if opponent King, Queen, Rook gets a discovered attack while or after the exchanges. remove an obsolete comment in position.cpp Passed STC non regression: https://tests.stockfishchess.org/tests/view/6437907594daa91835c290d0 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 107432 W: 28359 L: 28221 D: 50852 Elo +0.45 Ptnml(0-2): 298, 11724, 29524, 11882, 288 Passed LTC non-regression: https://tests.stockfishchess.org/tests/view/6438ed2ebd1a5470263c51e8 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 236288 W: 63656 L: 63656 D: 108976 Elo +0.00 Ptnml(0-2): 99, 22960, 72011, 22990, 84 closes https://github.com/official-stockfish/Stockfish/pull/4533 bench: 3741125 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Muzhen Gaming
Date: Sat Apr 22 10:43:29 2023 +0200 Timestamp: 1682153009 Simplify away complexity in evaluation Simplification STC: https://tests.stockfishchess.org/tests/view/64394bc0605991a801b4f6f0 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 72360 W: 19313 L: 19138 D: 33909 Elo +0.84 Ptnml(0-2): 206, 7883, 19800, 8112, 179 Simplification LTC: https://tests.stockfishchess.org/tests/view/6439e788c233ce943b6bdac1 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 224992 W: 60665 L: 60654 D: 103673 Elo +0.02 Ptnml(0-2): 96, 21875, 68526, 21920, 79 closes https://github.com/official-stockfish/Stockfish/pull/4530 Bench: 3709369 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Torom
Date: Sat Apr 22 10:38:25 2023 +0200 Timestamp: 1682152705 Set the length of GIT_SHA to 8 characters Previously, the length of git commit hashes could vary depending on the git environment. closes https://github.com/official-stockfish/Stockfish/pull/4527 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: MinetaS
Date: Sat Apr 22 10:37:14 2023 +0200 Timestamp: 1682152634 Remove some conditions at PV improvement reduction Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 63664 W: 17007 L: 16823 D: 29834 Elo +1.00 Ptnml(0-2): 163, 6998, 17336, 7162, 173 https://tests.stockfishchess.org/tests/view/6430b124028b029b01ac99f2 Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 90016 W: 24399 L: 24258 D: 41359 Elo +0.54 Ptnml(0-2): 52, 8672, 27405, 8841, 38 https://tests.stockfishchess.org/tests/view/64310e74028b029b01ad3131 closes https://github.com/official-stockfish/Stockfish/pull/4526 Bench: 3661938 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Michael Chaly
Date: Wed Apr 12 20:45:34 2023 +0200 Timestamp: 1681325134 Simplify stats assignment for Pv nodes This patch is a simplification of my recent elo gainer. Logically the Elo gainer didn't make much sense and this patch simplifies it into smth more logical. Instead of assigning negative bonuses to all non-first moves that enter PV nodes we assign positive bonuses in full depth search after LMR only for moves that will result in a fail high - thus not assigning positive bonuses for moves that will go to pv search - so doing "almost" the same as we do in master now for them. Logic differs for some other moves, though, but this removes some lines of code. Passed STC: https://tests.stockfishchess.org/tests/view/642cf5cf77ff3301150dc5ec LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 409320 W: 109124 L: 109308 D: 190888 Elo -0.16 Ptnml(0-2): 1149, 45385, 111751, 45251, 1124 Passed LTC: https://tests.stockfishchess.org/tests/view/642fe75d20eb941419bde200 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 260336 W: 70280 L: 70303 D: 119753 Elo -0.03 Ptnml(0-2): 99, 25236, 79528, 25199, 106 closes https://github.com/official-stockfish/Stockfish/pull/4522 Bench: 4286815 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stefan Geschwentner
Date: Wed Apr 12 20:43:08 2023 +0200 Timestamp: 1681324988 Remove good killer reduction rule. STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 246544 W: 65646 L: 65657 D: 115241 Elo -0.02 Ptnml(0-2): 706, 27350, 67138, 27405, 673 https://tests.stockfishchess.org/tests/view/642e253277ff3301150e9aa2 LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 165136 W: 44878 L: 44809 D: 75449 Elo +0.15 Ptnml(0-2): 64, 15991, 50378, 16082, 53 https://tests.stockfishchess.org/tests/view/6430db07028b029b01acd87f closes https://github.com/official-stockfish/Stockfish/pull/4519 Bench: 3746080 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Dubslow
Date: Wed Apr 12 20:40:53 2023 +0200 Timestamp: 1681324853 Remove nmpColor no benefit seen, neither in game play nor for zugzwang test positions STC: https://tests.stockfishchess.org/tests/view/642e293977ff3301150e9b55 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 161848 W: 43332 L: 43254 D: 75262 Elo +0.17 Ptnml(0-2): 418, 16987, 46058, 17021, 440 LTC: https://tests.stockfishchess.org/tests/view/642fea9420eb941419bde296 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 120208 W: 32529 L: 32418 D: 55261 Elo +0.32 Ptnml(0-2): 35, 11424, 37080, 11525, 40 closes https://github.com/official-stockfish/Stockfish/pull/4511 bench 3979409 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: peregrineshahin
Date: Wed Apr 12 20:38:43 2023 +0200 Timestamp: 1681324723 Fix capturing underpromotions issue Fix underpromotion captures are generated amongst quiets although dealt with as a capture_stage in search, this makes not skipping them when move count pruning kicks-in consistent with updating their histories amongst captures. Passed STC: https://tests.stockfishchess.org/tests/view/6415579f65775d3b539e7537 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 118896 W: 31678 L: 31553 D: 55665 Elo +0.37 Ptnml(0-2): 356, 12911, 32793, 13028, 360 Passed LTC: https://tests.stockfishchess.org/tests/view/641633b965775d3b539e9e95 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 126800 W: 34255 L: 34148 D: 58397 Elo +0.29 Ptnml(0-2): 57, 12216, 38763, 12291, 73 see also discussion in https://github.com/official-stockfish/Stockfish/pull/4436 closes https://github.com/official-stockfish/Stockfish/pull/4452 bench: 3979409 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Linmiao Xu
Date: Mon Apr 10 11:03:52 2023 +0200 Timestamp: 1681117432 Simplify away nnue scale pawn count multiplier Removes 2x multipliers in nnue scale calculation along with the pawn count term that was recently reintroduced. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/64305bc720eb941419bdf72e LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 38008 W: 10234 L: 10021 D: 17753 Elo +1.95 Ptnml(0-2): 96, 4151, 10323, 4312, 122 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/6430b76a028b029b01ac9bfd LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 91232 W: 24686 L: 24547 D: 41999 Elo +0.53 Ptnml(0-2): 30, 8721, 27986, 8838, 41 closes https://github.com/official-stockfish/Stockfish/pull/4510 bench 4017320 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Maxim Masiutin
Date: Mon Apr 10 10:56:42 2023 +0200 Timestamp: 1681117002 Do no initialize TM in all cases Avoid doing full TM initialization if it won't be used, avoids division by zero. closes https://github.com/official-stockfish/Stockfish/pull/4484 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Mon Apr 10 10:51:45 2023 +0200 Timestamp: 1681116705 Reduce Position::pieces() overloads Reduce the number of overloads for pieces() by using a more general template implementation. Secondly simplify some code in search.cpp using the new general functionality. TC https://tests.stockfishchess.org/tests/view/642ce27877ff3301150dc193 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 269640 W: 71775 L: 71809 D: 126056 Elo -0.04 Ptnml(0-2): 687, 27294, 78885, 27274, 680 closes https://github.com/official-stockfish/Stockfish/pull/4501 No functional change. see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Maxim Masiutin
Date: Mon Apr 10 09:29:52 2023 +0200 Timestamp: 1681111792 Made two specializations for affine transform easier to understand. Added AVX-512 for the specialization for small inputs closes https://github.com/official-stockfish/Stockfish/pull/4502 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: MinetaS
Date: Mon Apr 10 09:28:37 2023 +0200 Timestamp: 1681111717 Remove extraReduction Since bestValue becomes value and beta - alpha is always non-negative, extraReduction is always false, hence it has no effect. This patch includes small changes to improve readability. closes https://github.com/official-stockfish/Stockfish/pull/4505 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: MinetaS
Date: Mon Apr 10 09:27:35 2023 +0200 Timestamp: 1681111655 Use int conversion for Option class The current implementation generates warnings on MSVC. However, we have no real use cases for double-typed UCI option values now. Also parameter tuning only accepts following three types: int, Value, Score closes https://github.com/official-stockfish/Stockfish/pull/4505 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Maxim Masiutin
Date: Mon Apr 10 09:22:15 2023 +0200 Timestamp: 1681111335 Fix linking / character types of windows API calls ensures large pages can be allocated again. closes https://github.com/official-stockfish/Stockfish/pull/4509 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Joost VandeVondele
Date: Sun Apr 9 15:19:49 2023 +0200 Timestamp: 1681046389 Fix rootComplexity calculation The calculation of rootComplexity can't call eval when in check. Doing so triggers an assert if compiled in debug mode when the rootpos is evaluated using classical eval. Fixes https://github.com/official-stockfish/Stockfish/issues/4512 Passed STC: https://tests.stockfishchess.org/tests/view/6432697431feee5c6d306876 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 41096 W: 11017 L: 10815 D: 19264 Elo +1.71 Ptnml(0-2): 113, 4172, 11780, 4366, 117 Running LTC: https://tests.stockfishchess.org/tests/view/6432974d31feee5c6d306fc0 LLR: 1.76 (-2.94,2.94) <-1.75,0.25> Total: 73200 W: 19792 L: 19728 D: 33680 Elo +0.30 Ptnml(0-2): 24, 6659, 23182, 6699, 36 closes https://github.com/official-stockfish/Stockfish/pull/4515 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: FauziAkram
Date: Fri Apr 7 09:56:35 2023 +0200 Timestamp: 1680854195 Depth Tweak and tuning tunes reduction related parameters, and introduces more reduction on found good moves. credit for this patch goes also to candirufish Yoshie2000 dubslow peregrineshahin Vizvezdenec Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 38424 W: 10346 L: 10040 D: 18038 Elo +2.77 Ptnml(0-2): 103, 4111, 10473, 4427, 98 https://tests.stockfishchess.org/tests/view/642ca74277ff3301150db511 Passed LTC: LLR: 2.97 (-2.94,2.94) <0.50,2.50> Total: 136968 W: 37151 L: 36660 D: 63157 Elo +1.25 Ptnml(0-2): 43, 13052, 41808, 13533, 48 https://tests.stockfishchess.org/tests/view/642d632377ff3301150dddbe closes https://github.com/official-stockfish/Stockfish/pull/4499 bench: 3672914 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Michael Chaly
Date: Wed Apr 5 08:23:54 2023 +0200 Timestamp: 1680675834 Assign negative stat bonuses for quiet moves at Pv nodes This patch assigns negative stat bonuses for quiet moves at pv nodes which are searched at depth greater than this node assumes, so are extended. Passed STC: https://tests.stockfishchess.org/tests/view/6426198bdb43ab2ba6f9cfa2 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 548944 W: 147287 L: 146254 D: 255403 Elo +0.65 Ptnml(0-2): 1662, 59772, 150671, 60605, 1762 Passed LTC: https://tests.stockfishchess.org/tests/view/642be4f177ff3301150d892d LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 93352 W: 25400 L: 24994 D: 42958 Elo +1.51 Ptnml(0-2): 44, 8817, 28547, 9225, 43 closes https://github.com/official-stockfish/Stockfish/pull/4495 bench 5044536 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Muzhen Gaming
Date: Wed Apr 5 08:18:53 2023 +0200 Timestamp: 1680675533 Simplify away piece count condition for useClassical Simplify away the piece count condition for useClassical. In compensation, the psq requirement is increased by 15%. Also updated the Elo estimate for useClassical, based on recent testing. Simplification STC: https://tests.stockfishchess.org/tests/view/642acbb577ff3301150d3ef5 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 51984 W: 13906 L: 13707 D: 24371 Elo +1.33 Ptnml(0-2): 150, 5638, 14227, 5817, 160 Simplification LTC: https://tests.stockfishchess.org/tests/view/642b9c5777ff3301150d778a LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 119696 W: 32412 L: 32300 D: 54984 Elo +0.33 Ptnml(0-2): 53, 11529, 36567, 11651, 48 closes https://github.com/official-stockfish/Stockfish/pull/4494 Bench: 5089321 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: FauziAkram
Date: Wed Apr 5 08:15:34 2023 +0200 Timestamp: 1680675334 Parameters Tweak Passed STC LLR: 3.22 (-2.94,2.94) <0.00,2.00> Total: 664048 W: 177526 L: 176301 D: 310221 Elo +0.64 Ptnml(0-2): 2002, 72968, 180891, 74129, 2034 https://tests.stockfishchess.org/tests/view/64219901db43ab2ba6f901fa Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 77576 W: 21125 L: 20750 D: 35701 Elo +1.68 Ptnml(0-2): 24, 7350, 23669, 7717, 28 https://tests.stockfishchess.org/tests/view/642abe3377ff3301150d3a16 closes https://github.com/official-stockfish/Stockfish/pull/4493 bench: 4522076 see source |