| 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: Tue Mar 12 19:09:50 2024 +0100 Timestamp: 1710266990 Fix Raspberry Pi Compilation Reported by @Torom over discord. > dev build fails on Raspberry Pi 5 with clang ``` clang++ -o stockfish benchmark.o bitboard.o evaluate.o main.o misc.o movegen.o movepick.o position.o search.o thread.o timeman.o tt.o uci.o ucioption.o tune.o tbprobe.o nnue_misc.o half_ka_v2_hm.o network.o -fprofile-instr-generate -latomic -lpthread -Wall -Wcast-qual -fno-exceptions -std=c++17 -fprofile-instr-generate -pedantic -Wextra -Wshadow -Wmissing-prototypes -Wconditional-uninitialized -DUSE_PTHREADS -DNDEBUG -O3 -funroll-loops -DIS_64BIT -DUSE_POPCNT -DUSE_NEON=8 -march=armv8.2-a+dotprod -DUSE_NEON_DOTPROD -DGIT_SHA=627974c9 -DGIT_DATE=20240312 -DARCH=armv8-dotprod -flto=full /tmp/lto-llvm-e9300e.o: in function `_GLOBAL__sub_I_network.cpp': ld-temp.o:(.text.startup+0x704c): relocation truncated to fit: R_AARCH64_LDST64_ABS_LO12_NC against symbol `gEmbeddedNNUEBigEnd' defined in .rodata section in /tmp/lto-llvm-e9300e.o /usr/bin/ld: ld-temp.o:(.text.startup+0x704c): warning: one possible cause of this error is that the symbol is being referenced in the indicated code as if it had a larger alignment than was declared where it was defined ld-temp.o:(.text.startup+0x7068): relocation truncated to fit: R_AARCH64_LDST64_ABS_LO12_NC against symbol `gEmbeddedNNUESmallEnd' defined in .rodata section in /tmp/lto-llvm-e9300e.o /usr/bin/ld: ld-temp.o:(.text.startup+0x7068): warning: one possible cause of this error is that the symbol is being referenced in the indicated code as if it had a larger alignment than was declared where it was defined clang: error: linker command failed with exit code 1 (use -v to see invocation) make[2]: *** [Makefile:1051: stockfish] Error 1 make[2]: Leaving directory '/home/torsten/chess/Stockfish_master/src' make[1]: *** [Makefile:1058: clang-profile-make] Error 2 make[1]: Leaving directory '/home/torsten/chess/Stockfish_master/src' make: *** [Makefile:886: profile-build] Error 2 ``` closes https://github.com/official-stockfish/Stockfish/pull/5106 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: Tue Mar 12 16:47:11 2024 +0100 Timestamp: 1710258431 Search + Eval + Movepick Tune Passed STC: https://tests.stockfishchess.org/tests/view/65ef15220ec64f0526c44b04 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 24480 W: 6459 L: 6153 D: 11868 Elo +4.34 Ptnml(0-2): 101, 2798, 6184, 3008, 149 Passed LTC: https://tests.stockfishchess.org/tests/view/65ef4bac0ec64f0526c44f50 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 53316 W: 13561 L: 13203 D: 26552 Elo +2.33 Ptnml(0-2): 27, 5925, 14408, 6259, 39 closes https://github.com/official-stockfish/Stockfish/pull/5104 Bench: 1715522 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: Tue Mar 12 16:43:10 2024 +0100 Timestamp: 1710258190 Simplify increaseDepth to boolean expression Non-functional Simplification, maintaining the same logic as before. Big thanks to @peregrineshahin for helping with the code. Passed non-regression bounds: https://tests.stockfishchess.org/tests/view/65ec93860ec64f0526c42375 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 101088 W: 26196 L: 26047 D: 48845 Elo +0.51 Ptnml(0-2): 405, 11580, 26473, 11633, 453 closes https://github.com/official-stockfish/Stockfish/pull/5103 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: Tue Mar 12 16:41:08 2024 +0100 Timestamp: 1710258068 Refactor Network Usage Continuing from PR #4968, this update improves how Stockfish handles network usage, making it easier to manage and modify networks in the future. With the introduction of a dedicated Network class, creating networks has become straightforward. See uci.cpp: ```cpp NN::NetworkBig({EvalFileDefaultNameBig, "None", ""}, NN::embeddedNNUEBig) ``` The new `Network` encapsulates all network-related logic, significantly reducing the complexity previously required to support multiple network types, such as the distinction between small and big networks #4915. Non-Regression STC: https://tests.stockfishchess.org/tests/view/65edd26c0ec64f0526c43584 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 33760 W: 8887 L: 8661 D: 16212 Elo +2.33 Ptnml(0-2): 143, 3795, 8808, 3961, 173 Non-Regression SMP STC: https://tests.stockfishchess.org/tests/view/65ed71970ec64f0526c42fdd LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 59088 W: 15121 L: 14931 D: 29036 Elo +1.12 Ptnml(0-2): 110, 6640, 15829, 6880, 85 Compiled with `make -j profile-build` ``` bash ./bench_parallel.sh ./stockfish ./stockfish-nnue 13 50 sf_base = 1568540 +/- 7637 (95%) sf_test = 1573129 +/- 7301 (95%) diff = 4589 +/- 8720 (95%) speedup = 0.29260% +/- 0.556% (95%) ``` Compiled with `make -j build` ``` bash ./bench_parallel.sh ./stockfish ./stockfish-nnue 13 50 sf_base = 1472653 +/- 7293 (95%) sf_test = 1491928 +/- 7661 (95%) diff = 19275 +/- 7154 (95%) speedup = 1.30886% +/- 0.486% (95%) ``` closes https://github.com/official-stockfish/Stockfish/pull/5100 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: Gahtan Nahdi
Date: Mon Mar 11 10:08:40 2024 +0100 Timestamp: 1710148120 Simplify opponentWorsening condition Passed non-reg STC: https://tests.stockfishchess.org/tests/view/65ea18650ec64f0526c4033a LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 226624 W: 58601 L: 58589 D: 109434 Elo +0.02 Ptnml(0-2): 1030, 27193, 56819, 27275, 995 Passed non-reg LTC: https://tests.stockfishchess.org/tests/view/65eb7a220ec64f0526c4161a LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 243882 W: 61462 L: 61469 D: 120951 Elo -0.01 Ptnml(0-2): 197, 27559, 66419, 27586, 180 closes https://github.com/official-stockfish/Stockfish/pull/5102 Bench: 1601012 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: Mon Mar 11 10:04:37 2024 +0100 Timestamp: 1710147877 VVLTC search tune Result of 32k games of tuning at 60+0.6 8-thread. Link to the tuning attempt: https://tests.stockfishchess.org/tests/view/65def7b04b19edc854ebdec8 Passed VVLTC first SPRT: https://tests.stockfishchess.org/tests/view/65e51b53416ecd92c162ab7f LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 37570 W: 9613 L: 9342 D: 18615 Elo +2.51 Ptnml(0-2): 2, 3454, 11601, 3727, 1 Passed VVLTC second SPRT: https://tests.stockfishchess.org/tests/view/65e87d1c0ec64f0526c3eb39 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 123158 W: 31463 L: 31006 D: 60689 Elo +1.29 Ptnml(0-2): 5, 11589, 37935, 12044, 6 Note: The small net and psqt-only thresholds have been moved to evaluate.h. The reasoning is that these values are used in both `evaluate.cpp` and `evaluate_nnue.cpp`, and thus unifying their usage avoids inconsistencies during testing, where one occurrence is changed without the other (this happened during the search tune SPRT). closes https://github.com/official-stockfish/Stockfish/pull/5101 Bench: 1741218 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: Mon Mar 11 09:02:13 2024 +0100 Timestamp: 1710144133 Assorted cleanups - fix naming convention for `workingDirectory` - use type alias for `EvalFiles` everywhere - move `ponderMode` into `LimitsType` - move limits parsing into standalone static function closes https://github.com/official-stockfish/Stockfish/pull/5098 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: Robert Nurnberg @ elitebook
Date: Thu Mar 7 21:10:33 2024 +0100 Timestamp: 1709842233 Fix wrong constant usage in go mate Fixes an oversight in https://github.com/official-stockfish/Stockfish/pull/5094 In theory, master could stop search when run with `go mate 247` and return a TB loss (not a mate score). Also fixes the spelling of opponenWorsening. closes https://github.com/official-stockfish/Stockfish/pull/5096 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: Thu Mar 7 20:08:00 2024 +0100 Timestamp: 1709838480 VLTC time management tune Result of 35k games of SPSA tuning at 180+1.8. Tuning attempt can be found here: https://tests.stockfishchess.org/tests/view/65e40599f2ef6c733362b03b Passed VLTC 180+1.8: https://tests.stockfishchess.org/tests/view/65e5a6f5416ecd92c162b5d4 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 31950 W: 8225 L: 7949 D: 15776 Elo +3.00 Ptnml(0-2): 3, 3195, 9309, 3459, 9 Passed VLTC 240+2.4: https://tests.stockfishchess.org/tests/view/65e714de0ec64f0526c3d1f1 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 65108 W: 16558 L: 16202 D: 32348 Elo +1.90 Ptnml(0-2): 7, 6366, 19449, 6728, 4 closes https://github.com/official-stockfish/Stockfish/pull/5095 Bench: 1714391 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: Thu Mar 7 19:58:33 2024 +0100 Timestamp: 1709837913 Fix `go mate x` in multithreading Fixes two issues with master for go mate x: - when running go mate x in losing positions, master always goes to the maximal depth, arguably against what the UCI protocol demands - when running go mate x in winning positions with multiple threads, master may return non-mate scores from the search (this issue is present in stockfish since at least sf16) The issues are fixed by (a) also checking if score is mate -x and by (b) only letting mainthread stop the search for go mate x commands, and by not looking for a best thread but using mainthread as per the default. Related: niklasf/python-chess#1070 More diagnostics can be found here peregrineshahin#6 (comment) closes https://github.com/official-stockfish/Stockfish/pull/5094 No functional change Co-Authored-By: Robert Nürnberg <28635489+> 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: Thu Mar 7 19:56:30 2024 +0100 Timestamp: 1709837790 Introduce double extensions for PV nodes Our double/triple extensions were allowed only for non-pv nodes. This patch allows them to be done for PV nodes, with some stricter conditions. Passed STC: https://tests.stockfishchess.org/tests/view/65d657ec1d8e83c78bfddab8 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 339424 W: 88097 L: 87318 D: 164009 Elo +0.80 Ptnml(0-2): 1573, 39935, 85729, 41090, 1385 Passed LTC: https://tests.stockfishchess.org/tests/view/65dd63824b19edc854ebc433 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 459564 W: 115812 L: 114614 D: 229138 Elo +0.91 Ptnml(0-2): 248, 51441, 125173, 52705, 215 closes https://github.com/official-stockfish/Stockfish/pull/5093 Bench: 1714391 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: rn5f107s2
Date: Thu Mar 7 19:55:51 2024 +0100 Timestamp: 1709837751 Reduce futility_margin if opponents last move was bad This reduces the futiltiy_margin if our opponents last move was bad by around ~1/3 when not improving and ~1/2.7 when improving, the idea being to retroactively futility prune moves that were played, but turned out to be bad. A bad move is being defined as their staticEval before their move being lower as our staticEval now is. If the depth is 2 and we are improving the opponent worsening flag is not set, in order to not risk having a too low futility_margin, due to the fact that when these conditions are met the futility_margin already drops quite low. Passed STC: https://tests.stockfishchess.org/tests/live_elo/65e3977bf2ef6c733362aae3 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 122432 W: 31884 L: 31436 D: 59112 Elo +1.27 Ptnml(0-2): 467, 14404, 31035, 14834, 476 Passed LTC: https://tests.stockfishchess.org/tests/live_elo/65e47f40f2ef6c733362b6d2 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 421692 W: 106572 L: 105452 D: 209668 Elo +0.92 Ptnml(0-2): 216, 47217, 114865, 48327, 221 closes https://github.com/official-stockfish/Stockfish/pull/5092 Bench: 1565939 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: Thu Mar 7 19:53:48 2024 +0100 Timestamp: 1709837628 Update default main net to nn-1ceb1ade0001.nnue Created by retraining the previous main net `nn-b1a57edbea57.nnue` with: - some of the same options as before: - ranger21, more WDL skipping, 15% more loss when Q is too high - removal of the huge 514G pre-interleaved binpack - removal of SF-generated dfrc data (dfrc99-16tb7p-filt-v2.min.binpack) - interleaving many binpacks at training time - training with some bestmove capture positions where SEE < 0 - increased usage of torch.compile to speed up training by up to 40% ```yaml experiment-name: 2560--S10-dfrc0-to-dec2023-skip-more-wdl-15p-more-loss-high-q-see-ge0-sk28 nnue-pytorch-branch: linrock/nnue-pytorch/r21-more-wdl-skip-15p-more-loss-high-q-skip-see-ge0-torch-compile-more start-from-engine-test-net: True early-fen-skipping: 28 training-dataset: # similar, not the exact same as: # https://github.com/official-stockfish/Stockfish/pull/4635 - /data/S5-5af/leela96.v2.min.binpack - /data/S5-5af/test60-2021-11-12-novdec-12tb7p.v6-dd.min.binpack - /data/S5-5af/test77-2021-12-dec-16tb7p.v6-dd.min.binpack - /data/S5-5af/test78-2022-01-to-05-jantomay-16tb7p.v6-dd.min.binpack - /data/S5-5af/test78-2022-06-to-09-juntosep-16tb7p.v6-dd.min.binpack - /data/S5-5af/test79-2022-04-apr-16tb7p.v6-dd.min.binpack - /data/S5-5af/test79-2022-05-may-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2022-06-jun-16tb7p.v6-dd.min.unmin.binpack - /data/S5-5af/test80-2022-07-jul-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2022-08-aug-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2022-09-sep-16tb7p.v6-dd.min.unmin.binpack - /data/S5-5af/test80-2022-10-oct-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2022-11-nov-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2023-01-jan-16tb7p.v6-sk20.min.binpack - /data/S5-5af/test80-2023-02-feb-16tb7p.v6-dd.min.binpack - /data/S5-5af/test80-2023-03-mar-2tb7p.min.unmin.binpack - /data/S5-5af/test80-2023-04-apr-2tb7p.binpack - /data/S5-5af/test80-2023-05-may-2tb7p.min.dd.binpack # https://github.com/official-stockfish/Stockfish/pull/4782 - /data/S6-1ee1aba5ed/test80-2023-06-jun-2tb7p.binpack - /data/S6-1ee1aba5ed/test80-2023-07-jul-2tb7p.min.binpack # https://github.com/official-stockfish/Stockfish/pull/4972 - /data/S8-baff1edbea57/test80-2023-08-aug-2tb7p.v6.min.binpack - /data/S8-baff1edbea57/test80-2023-09-sep-2tb7p.binpack - /data/S8-baff1edbea57/test80-2023-10-oct-2tb7p.binpack # https://github.com/official-stockfish/Stockfish/pull/5056 - /data/S9-b1a57edbea57/test80-2023-11-nov-2tb7p.binpack - /data/S9-b1a57edbea57/test80-2023-12-dec-2tb7p.binpack num-epochs: 800 lr: 4.375e-4 gamma: 0.995 start-lambda: 1.0 end-lambda: 0.7 ``` This particular net was reached at epoch 759. Use of more torch.compile decorators in nnue-pytorch model.py than in the previous main net training run sped up training by up to 40% on Tesla gpus when using recent pytorch compiled with cuda 12: https://github.com/linrock/nnue-tools/blob/7fb9831/Dockerfile Skipping positions with bestmove captures where static exchange evaluation is >= 0 is based on the implementation from Sopel's NNUE training & experimentation log: https://docs.google.com/document/d/1gTlrr02qSNKiXNZ_SuO4-RjK4MXBiFlLE6jvNqqMkAY Experiment 293 - only skip captures with see>=0 Positions with bestmove captures where score == 0 are always skipped for compatibility with minimized binpacks, since the original minimizer sets scores to 0 for slight improvements in compression. The trainer branch used was: https://github.com/linrock/nnue-pytorch/tree/r21-more-wdl-skip-15p-more-loss-high-q-skip-see-ge0-torch-compile-more Binpacks were renamed to be sorted chronologically by default when sorted by name. The binpack data are otherwise the same as binpacks with similar names in the prior naming convention. Training data can be found at: https://robotmoon.com/nnue-training-data/ Passed STC: https://tests.stockfishchess.org/tests/view/65e3ddd1f2ef6c733362ae5c LLR: 2.92 (-2.94,2.94) <0.00,2.00> Total: 149792 W: 39153 L: 38661 D: 71978 Elo +1.14 Ptnml(0-2): 675, 17586, 37905, 18032, 698 Passed LTC: https://tests.stockfishchess.org/tests/view/65e4d91c416ecd92c162a69b LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 64416 W: 16517 L: 16135 D: 31764 Elo +2.06 Ptnml(0-2): 38, 7218, 17313, 7602, 37 closes https://github.com/official-stockfish/Stockfish/pull/5090 Bench: 1373183 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: Thu Mar 7 19:53:48 2024 +0100 Timestamp: 1709837628 Update elo estimates Tests used to change the elo worth of some functions: https://tests.stockfishchess.org/tests/view/65c3f69dc865510db0283eef https://tests.stockfishchess.org/tests/view/65c3f935c865510db0283f2a https://tests.stockfishchess.org/tests/view/65d1489f1d8e83c78bfd7dbf https://tests.stockfishchess.org/tests/view/65ce9d361d8e83c78bfd4951 https://tests.stockfishchess.org/tests/view/65cfcd901d8e83c78bfd6184 closes https://github.com/official-stockfish/Stockfish/pull/5089 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: Thu Mar 7 19:49:01 2024 +0100 Timestamp: 1709837341 Simplify Time Management Instead of having a formula for using extra time with larger increments. Simply set it to 1 when the increment is lower than 0.5s and to 1.1 when the increment is higher. The values can later on be further improved. Passed STC: https://tests.stockfishchess.org/tests/view/65d25d3c1d8e83c78bfd9293 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 27488 W: 7077 L: 6848 D: 13563 Elo +2.89 Ptnml(0-2): 96, 3041, 7267, 3218, 122 Passed LTC: https://tests.stockfishchess.org/tests/view/65d2a72c1d8e83c78bfd97fa LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 137568 W: 34612 L: 34512 D: 68444 Elo +0.25 Ptnml(0-2): 60, 14672, 39221, 14770, 61 Passed VLTC: https://tests.stockfishchess.org/tests/view/65d7d7d39b2da0226a5a205b LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 139650 W: 35229 L: 35134 D: 69287 Elo +0.24 Ptnml(0-2): 33, 14227, 41218, 14306, 41 Passed also the TCEC TC style suggested by vondele: https://tests.stockfishchess.org/tests/view/65e4ca73416ecd92c162a57d LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 134150 W: 34278 L: 34163 D: 65709 Elo +0.30 Ptnml(0-2): 561, 15727, 34444, 15722, 621 closes https://github.com/official-stockfish/Stockfish/pull/5076 Bench: 1553115 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: Gahtan Nahdi
Date: Sun Mar 3 15:45:13 2024 +0100 Timestamp: 1709477113 Simplify extension when ttMove is assumed to fail high over current beta Simplify extension value to -3 when ttMove is assumed to fail high over current beta. Passed non-reg STC: https://tests.stockfishchess.org/tests/view/65d66ed81d8e83c78bfddcba LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 235136 W: 60711 L: 60708 D: 113717 Elo +0.00 Ptnml(0-2): 969, 27904, 59874, 27797, 1024 Passed non-reg LTC: https://tests.stockfishchess.org/tests/view/65da2994944f2a78d4733107 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 662850 W: 166161 L: 166602 D: 330087 Elo -0.23 Ptnml(0-2): 394, 74895, 181274, 74482, 380 closes https://github.com/official-stockfish/Stockfish/pull/5088 Bench: 1553115 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: Gahtan Nahdi
Date: Sun Mar 3 15:42:17 2024 +0100 Timestamp: 1709476937 Simplify IIR Simplified depth reduction for PV nodes without a ttMove to 3. Passed STC non-reg: https://tests.stockfishchess.org/tests/view/65d1a90a1d8e83c78bfd855a LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 363168 W: 93648 L: 93791 D: 175729 Elo -0.14 Ptnml(0-2): 1557, 43692, 91221, 43565, 1549 Passed LTC non-reg: https://tests.stockfishchess.org/tests/view/65d5612d1d8e83c78bfdc8e2 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 58818 W: 14946 L: 14761 D: 29111 Elo +1.09 Ptnml(0-2): 36, 6595, 15962, 6780, 36 closes https://github.com/official-stockfish/Stockfish/pull/5062 Bench: 1505827 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 Mar 3 15:29:58 2024 +0100 Timestamp: 1709476198 Only evaluate the PSQT part of the small net for large evals. Thanks to Viren6 for suggesting to set complexity to 0. STC https://tests.stockfishchess.org/tests/view/65d7d6709b2da0226a5a203f LLR: 2.92 (-2.94,2.94) <0.00,2.00> Total: 328384 W: 85316 L: 84554 D: 158514 Elo +0.81 Ptnml(0-2): 1414, 39076, 82486, 39766, 1450 LTC https://tests.stockfishchess.org/tests/view/65dce6d290f639b028a54d2e LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 165162 W: 41918 L: 41330 D: 81914 Elo +1.24 Ptnml(0-2): 102, 18332, 45124, 18922, 101 closes https://github.com/official-stockfish/Stockfish/pull/5083 bench: 1504003 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 Mar 3 15:21:57 2024 +0100 Timestamp: 1709475717 Document TT code more Slight refactor of the TT code with the goal to make it easier to understand / tweak. Passed Non-Regression STC: https://tests.stockfishchess.org/tests/view/65d51e401d8e83c78bfdc427 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 56416 W: 14750 L: 14550 D: 27116 Elo +1.23 Ptnml(0-2): 227, 6386, 14796, 6558, 241 closes https://github.com/official-stockfish/Stockfish/pull/5061 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: Gahtan Nahdi
Date: Sun Mar 3 15:18:13 2024 +0100 Timestamp: 1709475493 Join conditions for move sorting heuristics closes https://github.com/official-stockfish/Stockfish/pull/5078 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 Mar 3 15:09:46 2024 +0100 Timestamp: 1709474986 Update Actions to Node20 ensure our CI continues to run after Node16 is obsolote on github. closes https://github.com/official-stockfish/Stockfish/pull/5074 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 Mar 3 15:07:32 2024 +0100 Timestamp: 1709474852 Make binaries executable again in CI closes https://github.com/official-stockfish/Stockfish/pull/5072 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 Mar 3 15:01:29 2024 +0100 Timestamp: 1709474489 Restore development closes https://github.com/official-stockfish/Stockfish/pull/5073 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: Sat Feb 24 18:15:04 2024 +0100 Timestamp: 1708794904 Stockfish 16.1 Official release version of Stockfish 16.1 Bench: 1303971 --- Stockfish 16.1 Today, we have the pleasure to announce Stockfish 16.1. As always, you can freely download it at https://stockfishchess.org/download and use it in the GUI of your choice[1]. Don't forget to join our Discord server[2] to get in touch with the community of developers and users of the project! *Quality of chess play* In our testing against its predecessor, Stockfish 16.1 shows a notable improvement in performance, with an Elo gain of up to 27 points and winning over 2 times more game pairs[3] than it loses. *Update highlights* *Improved evaluation* - Updated neural network architecture: The neural network architecture has undergone two updates and is currently in its 8th version[4]. - Removal of handcrafted evaluation (HCE): This release marks the removal of the traditional handcrafted evaluation and the transition to a fully neural network-based approach[5]. - Dual NNUE: For the first time, Stockfish includes a secondary neural network[6], used to quickly evaluate positions that are easily decided. *UCI Options removed* `Use NNUE` and `UCI_AnalyseMode`[7] have been removed as they no longer had any effect. `SlowMover`[8] has also been removed in favor of `Move Overhead`. *More binaries* We now offer 13 new binaries. These new binaries include `avx512`, `vnni256`, `vnni512`, `m1-apple-silicon`, and `armv8-dotprod`, which take advantage of specific CPU instructions for improved performance. For most users, using `sse41-popcnt` (formerly `modern`), `avx2`, or `bmi2` should be enough, but if your CPU supports these new instructions, feel free to try them! *Development changes* - Updated testing book: This new book[9], now derived exclusively from the open Lichess database[10], is 10 times larger than its predecessor, and has been used to test potential improvements to Stockfish over the past few months. - Consolidation of repositories: Aiming to simplify access to our resources, we have moved most Stockfish-related repositories into the official Stockfish organization[11] on GitHub. - Growing maintainer team: We welcome Disservin[12] to the team of maintainers of the project! This extra pair of hands will ensure the lasting success of Stockfish. *Thank you* The Stockfish project builds on a thriving community of enthusiasts (thanks everybody!) who contribute their expertise, time, and resources to build a free and open-source chess engine that is robust, widely available, and very strong. We would like to express our gratitude for the 10k stars[13] that light up our GitHub project! Thank you for your support and encouragement – your recognition means a lot to us. We invite our chess fans to join the Fishtest testing framework[14], and programmers to contribute to the project either directly to Stockfish[15] (C++), to Fishtest[16] (HTML, CSS, JavaScript, and Python), to our trainer nnue-pytorch[17] (C++ and Python), or to our website[18] (HTML, CSS/SCSS, and JavaScript). The Stockfish team [1] https://github.com/official-stockfish/Stockfish/wiki/Download-and-usage#download-a-chess-gui [2] https://discord.gg/GWDRS3kU6R [3] https://tests.stockfishchess.org/tests/view/65d666051d8e83c78bfddbd8 [4] https://github.com/official-stockfish/nnue-pytorch/blob/master/docs/nnue.md#sfnnv8-architecture [5] https://github.com/official-stockfish/Stockfish/commit/af110e0 [6] https://github.com/official-stockfish/Stockfish/commit/584d9ef [7] https://github.com/official-stockfish/Stockfish/commit/c53d2ec [8] https://github.com/official-stockfish/Stockfish/commit/536d692 [9] https://github.com/official-stockfish/books/commit/426eca4 [10] https://database.lichess.org/ [11] https://github.com/official-stockfish/ [12] https://github.com/Disservin [13] https://github.com/official-stockfish/Stockfish/stargazers [14] https://github.com/official-stockfish/fishtest/wiki/Running-the-worker [15] https://github.com/official-stockfish/Stockfish [16] https://github.com/official-stockfish/fishtest [17] https://github.com/official-stockfish/nnue-pytorch [18] https://github.com/official-stockfish/stockfish-web 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: Robert Nurnberg @ elitebook
Date: Sat Feb 24 17:59:41 2024 +0100 Timestamp: 1708793981 Update the WDL model Based on 130M positions from 2.1M games. ``` Look recursively in directory pgns for games from SPRT tests using books matching "UHO_4060_v..epd|UHO_Lichess_4852_v1.epd" for SF revisions between 8e75548f2a10969c1c9211056999efbcebe63f9a (from 2024-02-17 17:11:46 +0100) and HEAD (from 2024-02-17 17:13:07 +0100). Based on 127920843 positions from 2109240 games, NormalizeToPawnValue should change from 345 to 356. ``` The patch only affects the UCI-reported cp and wdl values. closes https://github.com/official-stockfish/Stockfish/pull/5070 No functional change see source |