| 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 Sep 11 22:37:39 2023 +0200 Timestamp: 1694464659 Update default net to nn-1ee1aba5ed4c.nnue Created by retraining the master net on a dataset composed by: - adding Leela data from T60 jul-dec 2020, T77 nov 2021, T80 jun-jul 2023 - deduplicating and unminimizing parts of the dataset before interleaving Trained initially with max epoch 800, then increased near the end of training twice. First to 960, then 1200. After training, post-processing involved: - greedy permuting L1 weights with https://github.com/official-stockfish/Stockfish/pull/4620 - greedy 2- and 3- cycle permuting with https://github.com/official-stockfish/Stockfish/pull/4640 python3 easy_train.py \ --experiment-name 2048-retrain-S6-sk28 \ --training-dataset /data/S6.binpack \ --early-fen-skipping 28 \ --start-from-engine-test-net True \ --max_epoch 1200 \ --lr 4.375e-4 \ --gamma 0.995 \ --start-lambda 1.0 \ --end-lambda 0.7 \ --tui False \ --seed $RANDOM \ --gpus 0 In the list of datasets below, periods in the filename represent the sequence of steps applied to arrive at the particular binpack. For example: test77-dec2021-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack 1. test77 dec2021 data rescored with 16 TB of syzygy tablebases during data conversion 2. filtered with csv_filter_v6_dd.py - v6 filtering and deduplication in one step 3. minimized with the original mar2023 implementation of `minimize_binpack` in the tools branch 4. unminimized by removing all positions with score == 32002 (`VALUE_NONE`) Binpacks were: - filtered with: https://github.com/linrock/nnue-data - unminimized with: https://github.com/linrock/Stockfish/tree/tools-unminify - deduplicated with: https://github.com/linrock/Stockfish/tree/tools-dd DATASETS=( leela96-filt-v2.min.unminimized.binpack dfrc99-16tb7p-eval-filt-v2.min.unminimized.binpack # most of the 0dd1cebea57 v6-dd dataset (without test80-jul2022) # https://github.com/official-stockfish/Stockfish/pull/4606 test60-novdec2021-12tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test77-dec2021-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test78-jantomay2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test78-juntosep2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test79-apr2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test79-may2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test80-jun2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test80-aug2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test80-sep2022-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test80-oct2022-16tb7p.filter-v6-dd.min.binpack test80-nov2022-16tb7p.filter-v6-dd.min.binpack test80-jan2023-3of3-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack test80-feb2023-16tb7p.filter-v6-dd.min-mar2023.unminimized.binpack # older Leela data, recently converted test60-octnovdec2020-2tb7p.min.unminimized.binpack test60-julaugsep2020-2tb7p.min.binpack test77-nov2021-2tb7p.min.dd.binpack # newer Leela data test80-mar2023-2tb7p.min.unminimized.binpack test80-apr2023-2tb7p.filter-v6-sk16.min.unminimized.binpack test80-may2023-2tb7p.min.dd.binpack test80-jun2023-2tb7p.min.binpack test80-jul2023-2tb7p.binpack ) python3 interleave_binpacks.py ${DATASETS[@]} /data/S6.binpack Training data can be found at: https://robotmoon.com/nnue-training-data/ Local elo at 25k nodes per move: nn-epoch1059 : 2.7 +/- 1.6 Passed STC: https://tests.stockfishchess.org/tests/view/64fc8d705dab775b5359db42 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 168352 W: 43216 L: 42704 D: 82432 Elo +1.06 Ptnml(0-2): 599, 19672, 43134, 20160, 611 Passed LTC: https://tests.stockfishchess.org/tests/view/64fd44a75dab775b5359f065 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 154194 W: 39436 L: 38881 D: 75877 Elo +1.25 Ptnml(0-2): 78, 16577, 43238, 17120, 84 closes https://github.com/official-stockfish/Stockfish/pull/4782 Bench: 1603079 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: Mon Sep 11 22:36:26 2023 +0200 Timestamp: 1694464586 Do more futility pruning in qsearch This patch introduces a third futility pruning heuristic in qsearch. The idea is that the static exchange evaluation is much worse than the difference between futility base and alpha. Thus we can assume that the probability of the move being good enough to beat alpha is low so it can be pruned. Passed STC: https://tests.stockfishchess.org/tests/view/64fc982a5dab775b5359dc83 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 36576 W: 9484 L: 9170 D: 17922 Elo +2.98 Ptnml(0-2): 121, 4119, 9495, 4431, 122 Passed LTC: https://tests.stockfishchess.org/tests/view/64fcc7935dab775b5359e1a9 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 135408 W: 34556 L: 34041 D: 66811 Elo +1.32 Ptnml(0-2): 56, 14462, 38165, 14953, 68 closes https://github.com/official-stockfish/Stockfish/pull/4781 Bench: 1330793 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: cj5716
Date: Mon Sep 11 22:30:57 2023 +0200 Timestamp: 1694464257 Simplify cutnode depth condition With this patch, the depth condition for the cutnodes reduction is loosened from tte->depth() >= depth + 3 to just tte->depth() >= depth. Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 101152 W: 25830 L: 25682 D: 49640 Elo +0.51 Ptnml(0-2): 312, 11788, 26258, 11876, 342 https://tests.stockfishchess.org/tests/view/64fd15635dab775b5359eaa6 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 82542 W: 20980 L: 20824 D: 40738 Elo +0.66 Ptnml(0-2): 42, 8795, 23440, 8953, 41 https://tests.stockfishchess.org/tests/view/64fda3545dab775b5359fbf1 closes https://github.com/official-stockfish/Stockfish/pull/4780 Bench: 1479029 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: Sebastian Buchwald
Date: Mon Sep 11 22:15:22 2023 +0200 Timestamp: 1694463322 Cleanup git checkout actions We now fetch only the current commit for jobs that don't need the git history. For the Prerelease job, we don't checkout the code at all. closes https://github.com/official-stockfish/Stockfish/pull/4779 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: Tomasz Sobczyk
Date: Mon Sep 11 22:11:30 2023 +0200 Timestamp: 1694463090 Prevent usage of AVX-512 for the last layer. Add more static checks regarding the SIMD width match. STC: https://tests.stockfishchess.org/tests/view/64f5c568a9bc5a78c669e70e LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 125216 W: 31756 L: 31636 D: 61824 Elo +0.33 Ptnml(0-2): 327, 13993, 33848, 14113, 327 Fixes a bug introduced in 2f2f45f, where with AVX-512 the weights and input to the last layer were being read out of bounds. Now AVX-512 is only used for the layers it can be used for. Additional static assertions have been added to prevent more errors like this in the future. closes https://github.com/official-stockfish/Stockfish/pull/4773 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: Sebastian Buchwald
Date: Mon Sep 11 22:07:55 2023 +0200 Timestamp: 1694462875 Avoid "using namespace std" This is a cleanup PR that prepares the automatic checking of missing or superfluous #include directives via the include-what-you-use (IWYU) tool on the CI. Unfortunately, IWYU proposes additional includes for "namespace std" although we don't need them. To avoid the problem, the commit removes all "using namespace std" statements from the code and directly uses the std:: prefix instead. Alternatively, we could add specific usings (e.g. "using std::string") foreach used type. Also, a mix of both approaches would be possible. I decided for the prefix approach because most of the files were already using the std:: prefixes despite the "using namespace std". closes https://github.com/official-stockfish/Stockfish/pull/4772 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: Stéphane Nicolet
Date: Sun Sep 3 09:28:16 2023 +0200 Timestamp: 1693726096 Introduce simple_eval() for lazy evaluations This patch implements the pure materialistic evaluation called simple_eval() to gain a speed-up during Stockfish search. We use the so-called lazy evaluation trick: replace the accurate but slow NNUE network evaluation by the super-fast simple_eval() if the position seems to be already won (high material advantage). To guard against some of the most obvious blunders introduced by this idea, this patch uses the following features which will raise the lazy evaluation threshold in some situations: - avoid lazy evals on shuffling branches in the search tree - avoid lazy evals if the position at root already has a material imbalance - avoid lazy evals if the search value at root is already winning/losing. Moreover, we add a small random noise to the simple_eval() term. This idea (stochastic mobility in the minimax tree) was worth about 200 Elo in the pure simple_eval() player on Lichess. Overall, the current implementation in this patch evaluates about 2% of the leaves in the search tree lazily. -------------------------------------------- STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 60352 W: 15585 L: 15234 D: 29533 Elo +2.02 Ptnml(0-2): 216, 6906, 15578, 7263, 213 https://tests.stockfishchess.org/tests/view/64f1d9bcbd9967ffae366209 LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 35106 W: 8990 L: 8678 D: 17438 Elo +3.09 Ptnml(0-2): 14, 3668, 9887, 3960, 24 https://tests.stockfishchess.org/tests/view/64f25204f5b0c54e3f04c0e7 verification run at VLTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 74362 W: 19088 L: 18716 D: 36558 Elo +1.74 Ptnml(0-2): 6, 7226, 22348, 7592, 9 https://tests.stockfishchess.org/tests/view/64f2ecdbf5b0c54e3f04d3ae All three tests above were run with adjudication off, we also verified that there was no regression on matetracker (thanks Disservin!). ---------------------------------------------- closes https://github.com/official-stockfish/Stockfish/pull/4771 Bench: 1393714 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: Sun Sep 3 09:10:27 2023 +0200 Timestamp: 1693725027 Rename one variable To enhance code clarity and prevent potential confusion with the 'r' variable assigned to reduction later in the code, this pull request renames it to 'reductionScale' when we use the same name in the reduction() function. Using distinct variable names for separate functions improves code readability and maintainability. closes https://github.com/official-stockfish/Stockfish/pull/4765 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: pb00067
Date: Sun Sep 3 08:57:43 2023 +0200 Timestamp: 1693724263 Simplify slider_blocker calculation Now that classical evaluation was removed, we can adapt this method to the needs of set_check_info. STC: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 298176 W: 75802 L: 75868 D: 146506 Elo -0.08 Ptnml(0-2): 908, 33608, 80192, 33402, 978 https://tests.stockfishchess.org/tests/view/64e70b899009777747557b43 closes https://github.com/official-stockfish/Stockfish/pull/4753 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: Disservin
Date: Sun Sep 3 08:40:08 2023 +0200 Timestamp: 1693723208 Simplify README The UCI protocol is rather technical and has little value in our README. Instead it should be explained in our wiki. "Contributing" is moved above "Compiling Stockfish" to make it more prominent. Also move the CONTRIBUTING.md into the root directory and include it in the distributed artifacts/releases. closes https://github.com/official-stockfish/Stockfish/pull/4766 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: Disservin
Date: Sun Sep 3 08:24:51 2023 +0200 Timestamp: 1693722291 Cleanup includes Reorder a few includes, include "position.h" where it was previously missing and apply include-what-you-use suggestions. Also make the order of the includes consistent, in the following way: 1. Related header (for .cpp files) 2. A blank line 3. C/C++ headers 4. A blank line 5. All other header files closes https://github.com/official-stockfish/Stockfish/pull/4763 fixes https://github.com/official-stockfish/Stockfish/issues/4707 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: ttruscott
Date: Sun Sep 3 08:07:59 2023 +0200 Timestamp: 1693721279 Omit two unneeded tests These redundant tests were intended as a speed-up, but they do not seem to provide any speed anymore. STC: https://tests.stockfishchess.org/tests/view/64e9079c85e3e95030fd8259 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 134688 W: 34338 L: 34226 D: 66124 Elo +0.29 Ptnml(0-2): 426, 15122, 36124, 15258, 414 closes https://github.com/official-stockfish/Stockfish/pull/4767 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: Stéphane Nicolet
Date: Thu Aug 24 08:11:17 2023 +0200 Timestamp: 1692857477 Play turbulent when defending, simpler when attacking This patch decays a little the evaluation (up to a few percent) for positions which have a large complexity measure (material imbalance, positional compensations, etc). This may have nice consequences on the playing style, as it modifies the search differently for attack and defense, both effects being desirable: - to see the effect on positions when Stockfish is defending, let us suppose for instance that the side to move is Stockfish and the nnue evaluation on the principal variation is -100 : this patch will decay positions with an evaluation of -103 (say) to the same level, provided they have huge material imbalance or huge positional compensation. In other words, chaotic positions with an evaluation of -103 are now comparable in our search tree to stable positions with an evaluation of -100, and chaotic positions with an evaluation of -102 are now preferred to stable positions with an evaluation of -100. - the effect on positions when Stockfish is attacking is the opposite. Let us suppose for instance that the side to move is Stockfish and the nnue evaluation on the principal variation is +100 : this patch will decay the evaluation to +97 if the positions on the principal variation have huge material imbalance or huge positional compensation. In other words, stable positions with an evaluation of +97 are now comparable in our search tree to chaotic positions with an evaluation of +100, and stable positions with an evaluation of +98 are now preferred to chaotic positions with an evaluation of +100. So the effect of this small change of evaluation on the playing style is that Stockfish should now play a little bit more turbulent when defending, and choose slightly simpler lines when attacking. passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 268448 W: 68713 L: 68055 D: 131680 Elo +0.85 Ptnml(0-2): 856, 31514, 68943, 31938, 973 https://tests.stockfishchess.org/tests/view/64e252bb99700912526653ed passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 141060 W: 36066 L: 35537 D: 69457 Elo +1.30 Ptnml(0-2): 71, 15179, 39522, 15666, 92 https://tests.stockfishchess.org/tests/view/64e4447a9009777747553725 closes https://github.com/official-stockfish/Stockfish/pull/4762 Bench: 1426295 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: Shahin M. Shahin
Date: Tue Aug 22 11:32:51 2023 +0200 Timestamp: 1692696771 Reduce repetitions branches Increase reduction on retrying a move we just retreated that falls in a repetition: if current move can be the same move from previous previous turn then we retreated that move on the previous turn, this patch increases reduction if retrying that move results in a repetition. How to continue from there? Maybe we some variants of this idea could bring Elo too (only testing the destination square, or triangulations, etc.) Passed STC: https://tests.stockfishchess.org/tests/view/64e1aede883cbb7cbd9ad976 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 424000 W: 108675 L: 107809 D: 207516 Elo +0.71 Ptnml(0-2): 1296, 47350, 113896, 48108, 1350 Passed LTC: https://tests.stockfishchess.org/tests/view/64e32d629970091252666872 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 89682 W: 22976 L: 22569 D: 44137 Elo +1.58 Ptnml(0-2): 39, 8843, 26675, 9240, 44 closes https://github.com/official-stockfish/Stockfish/pull/4757 bench: 1574347 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: cj5716
Date: Tue Aug 22 11:22:15 2023 +0200 Timestamp: 1692696135 Do more full window searches Remove the value < beta condition for doing full window searches. As an added bonus the condition for full-window search is now much more similar to other fail-soft engines. Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 244608 W: 62286 L: 62294 D: 120028 Elo -0.01 Ptnml(0-2): 758, 28772, 63214, 28840, 720 https://tests.stockfishchess.org/tests/view/64d72d365b17f7c21c0e6675 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 311460 W: 78909 L: 78985 D: 153566 Elo -0.08 Ptnml(0-2): 129, 33959, 87656, 33831, 155 https://tests.stockfishchess.org/tests/view/64dca2265b17f7c21c0ee06c closes https://github.com/official-stockfish/Stockfish/pull/4755 Bench: 1624221 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: Gian-Carlo Pascutto
Date: Tue Aug 22 11:14:19 2023 +0200 Timestamp: 1692695659 Simplify Square Clipped ReLU code. Squared numbers are never negative, so barring any wraparound there is no need to clamp to 0. From reading the code, there's no obvious way to get wraparound, so the entire operation can be simplified away. Updated original truncated code comments to be sensible. Verified by running ./stockfish bench 128 1 24 and by the following test: STC: https://tests.stockfishchess.org/tests/view/64da4db95b17f7c21c0eabe7 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 60224 W: 15425 L: 15236 D: 29563 Elo +1.09 Ptnml(0-2): 195, 6576, 16382, 6763, 196 closes https://github.com/official-stockfish/Stockfish/pull/4751 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: Stéphane Nicolet
Date: Tue Aug 22 10:59:39 2023 +0200 Timestamp: 1692694779 Fix some tabs in Makefile Avoid mixing spaces and tabs for indentation in Makefile closes https://github.com/official-stockfish/Stockfish/pull/4759 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: Tue Aug 22 10:53:49 2023 +0200 Timestamp: 1692694429 Update links to fishtest Fishtest has moved to https://github.com/official-stockfish/fishtest/ closes https://github.com/official-stockfish/Stockfish/pull/4758 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: Matthies
Date: Tue Aug 22 10:43:51 2023 +0200 Timestamp: 1692693831 Allow compilation on Raspi (for ARMv8) Current master fails to compile for ARMv8 on Raspi cause gcc (version 10.2.1) does not like to cast between signed and unsigned vector types. This patch fixes it by using unsigned vector pointer for ARM to avoid implicite cast. closes https://github.com/official-stockfish/Stockfish/pull/4752 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: Stéphane Nicolet
Date: Tue Aug 22 10:39:03 2023 +0200 Timestamp: 1692693543 Fix some 'possible loss of data' warnings Patch by Maxim Masiutin closes https://github.com/official-stockfish/Stockfish/pull/4440 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: Disservin
Date: Wed Aug 16 21:25:42 2023 +0200 Timestamp: 1692213942 Add -funroll-loops to CXXFLAGS Optimize profiling data accuracy by enabling -funroll-loops during the profile generation phase, in addition to its default activation by -fprofile-use. This seems to produce a slightly faster binary, for most compilers. make -j profile-build ARCH=x86-64-avx2 sf_base = 1392875 +/- 5905 (95%) sf_test = 1402332 +/- 7303 (95%) diff = 9457 +/- 4413 (95%) speedup = 0.67896% +/- 0.317% (95%) STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 34784 W: 8970 L: 8665 D: 17149 Elo +3.05 Ptnml(0-2): 115, 3730, 9405, 4019, 123 https://tests.stockfishchess.org/tests/view/64d944815b17f7c21c0e92e1 closes https://github.com/official-stockfish/Stockfish/pull/4750 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: Muzhen Gaming
Date: Wed Aug 16 21:24:58 2023 +0200 Timestamp: 1692213898 Simplify PvNode Reduction Remove the depth condition for PvNode reduction. Simplification STC: https://tests.stockfishchess.org/tests/view/64d308fa5b17f7c21c0e0303 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 38976 W: 10106 L: 9889 D: 18981 Elo +1.93 Ptnml(0-2): 129, 4479, 10040, 4726, 114 Simplification LTC: https://tests.stockfishchess.org/tests/view/64d457db5b17f7c21c0e236f LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 156402 W: 39727 L: 39645 D: 77030 Elo +0.18 Ptnml(0-2): 71, 17143, 43696, 17215, 76 closes https://github.com/official-stockfish/Stockfish/pull/4747 Bench: 1493904 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: SzilBalazs
Date: Wed Aug 16 21:24:58 2023 +0200 Timestamp: 1692213898 Fix dead link to compression algorithm in tbprobe closes https://github.com/official-stockfish/Stockfish/pull/4746 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: Disservin
Date: Wed Aug 16 21:24:54 2023 +0200 Timestamp: 1692213894 Add CONTRIBUTING.md closes https://github.com/official-stockfish/Stockfish/pull/4741 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: Sun Aug 13 11:59:06 2023 +0200 Timestamp: 1691920746 Simplify material difference in evaluate STC: https://tests.stockfishchess.org/tests/view/64d166235b17f7c21c0ddc15 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 100032 W: 25698 L: 25547 D: 48787 Elo +0.52 Ptnml(0-2): 308, 11748, 25771, 11863, 326 LTC: https://tests.stockfishchess.org/tests/view/64d28c085b17f7c21c0df775 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 123870 W: 31463 L: 31348 D: 61059 Elo +0.32 Ptnml(0-2): 63, 13487, 34719, 13604, 62 Besides rebasing I replaced PawnValueMg w/ 126 explicitly to decouple from https://tests.stockfishchess.org/tests/view/64d212de5b17f7c21c0debbb by @peregrineshahin which also passed. #4734 closes https://github.com/official-stockfish/Stockfish/pull/4731 Bench: 1447866 see source |