| 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: noobpwnftw
Date: Mon Nov 22 13:31:13 2021 +0100 Timestamp: 1637584273 Revert and fix earlier windows NUMA patch revert https://github.com/official-stockfish/Stockfish/commit/9048ac00db12a9ac48bff9b9eb145b30ff88d984 due to core spread problem and fix new OS compatibility with another method. This code assumes that if one NUMA node has more than one processor groups, they are created equal(having equal amount of cores assigned to each of the groups), and also the total number of available cores contained in such groups are equal to the number of available cores within one NUMA node because of how best_node function works. closes https://github.com/official-stockfish/Stockfish/pull/3798 fixes https://github.com/official-stockfish/Stockfish/pull/3787 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 Nov 21 21:56:13 2021 +0100 Timestamp: 1637528173 Remove appveyor CI retire msvc support and corresponding CI. No active development happens on msvc, and build is much slower or wrong. gcc (mingw) is our toolchain of choice also on windows, and the latter is tested. 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 Nov 21 21:18:08 2021 +0100 Timestamp: 1637525888 Introduce Optimism Current master implements a scaling of the raw NNUE output value with a formula equivalent to 'eval = alpha * NNUE_output', where the scale factor alpha varies between 1.8 (for early middle game) and 0.9 (for pure endgames). This feature allows Stockfish to keep material on the board when she thinks she has the advantage, and to seek exchanges and simplifications when she thinks she has to defend. This patch slightly offsets the turning point between these two strategies, by adding to Stockfish's evaluation a small "optimism" value before actually doing the scaling. The effect is that SF will play a little bit more risky, trying to keep the tension a little bit longer when she is defending, and keeping even more material on the board when she has an advantage. We note that this patch is similar in spirit to the old "Contempt" idea we used to have in classical Stockfish, but this implementation differs in two key points: a) it has been tested as an Elo-gainer against master; b) the values output by the search are not changed on average by the implementation (in other words, the optimism value changes the tension/exchange strategy, but a displayed value of 1.0 pawn has the same signification before and after the patch). See the old comment https://github.com/official-stockfish/Stockfish/pull/1361#issuecomment-359165141 for some images illustrating the ideas. ------- finished yellow at STC: LLR: -2.94 (-2.94,2.94) <0.00,2.50> Total: 165048 W: 41705 L: 41611 D: 81732 Elo +0.20 Ptnml(0-2): 565, 18959, 43245, 19327, 428 https://tests.stockfishchess.org/tests/view/61942a3dcd645dc8291c876b passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 121656 W: 30762 L: 30287 D: 60607 Elo +1.36 Ptnml(0-2): 87, 12558, 35032, 13095, 56 https://tests.stockfishchess.org/tests/view/61962c58cd645dc8291c8877 ------- How to continue from there? a) the shape (slope and amplitude) of the sigmoid used to compute the optimism value could be tweaked to try to gain more Elo, so the parameters of the sigmoid function in line 391 of search.cpp could be tuned with SPSA. Manual tweaking is also possible using this Desmos page: https://www.desmos.com/calculator/jhh83sqq92 b) in a similar vein, with two recents patches affecting the scaling of the NNUE evaluation in evaluate.cpp, now could be a good time to try a round of SPSA tuning of the NNUE network; c) this patch will tend to keep tension in middlegame a little bit longer, so any patch improving the defensive aspect of play via search extensions in risky, tactical positions would be welcome. ------- closes https://github.com/official-stockfish/Stockfish/pull/3797 Bench: 6184852 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 Nov 15 18:20:10 2021 +0100 Timestamp: 1636996810 Simplify Pv nodes related logic in LMR Instead of having 2 separate conditions for Pv nodes reductions we can actually write them together. Despite it's not being strictly logically the same bench actually doesn't change up to depth 20, so them interacting is really rare and thus it's just a removal of extra PvNode check most of the time. passed STC: https://tests.stockfishchess.org/tests/view/618ce27cd7a085ad008ef4e9 LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 37488 W: 9424 L: 9279 D: 18785 Elo +1.34 Ptnml(0-2): 90, 3903, 10634, 4006, 111 passed LTC: https://tests.stockfishchess.org/tests/view/618d2585d7a085ad008ef527 LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 49968 W: 12449 L: 12331 D: 25188 Elo +0.82 Ptnml(0-2): 27, 4745, 15309, 4889, 14 closes https://github.com/official-stockfish/Stockfish/pull/3792 Bench: 6339548 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: noobpwnftw
Date: Mon Nov 15 18:19:53 2021 +0100 Timestamp: 1636996793 Fix processor group binding under Windows. Starting with Windows Build 20348 the behavior of the numa API has been changed: https://docs.microsoft.com/en-us/windows/win32/procthread/numa-support Old code only worked because there was probably a limit on how many cores/threads can reside within one NUMA node, and the OS creates extra NUMA nodes when necessary, however the actual mechanism of core binding is done by "Processor Groups"(https://docs.microsoft.com/en-us/windows/win32/procthread/processor-groups). With a newer OS, one NUMA node can have many such "Processor Groups" and we should just consistently use the number of groups to bind the threads instead of deriving the topology from the number of NUMA nodes. This change is required to spread threads on all cores on Windows 11 with a 3990X CPU. It has only 1 NUMA node with 2 groups of 64 threads each. closes https://github.com/official-stockfish/Stockfish/pull/3787 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: Thu Nov 11 00:56:57 2021 +0100 Timestamp: 1636588617 Tune a few NNUE related scaling parameters passed STC LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 102480 W: 26099 L: 25708 D: 50673 Elo +1.33 Ptnml(0-2): 282, 11637, 27003, 12044, 274 https://tests.stockfishchess.org/tests/view/618820e3d7a085ad008ef1dd passed LTC LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 165512 W: 41689 L: 41112 D: 82711 Elo +1.21 Ptnml(0-2): 82, 17255, 47510, 17822, 87 https://tests.stockfishchess.org/tests/view/6188b470d7a085ad008ef239 closes https://github.com/official-stockfish/Stockfish/pull/3784 Bench: 6339548 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: bmc4
Date: Mon Nov 8 13:14:18 2021 +0100 Timestamp: 1636373658 Simplify away the Reverse Move penalty This simplifies the penalty for reverse move introduced in https://github.com/official-stockfish/Stockfish/pull/2294 . STC: LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 81696 W: 20627 L: 20540 D: 40529 Elo +0.37 Ptnml(0-2): 221, 9390, 21559, 9437, 241 https://tests.stockfishchess.org/tests/view/618810acd7a085ad008ef1cc LTC: LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 44136 W: 11021 L: 10890 D: 22225 Elo +1.03 Ptnml(0-2): 28, 4570, 12746, 4691, 33 https://tests.stockfishchess.org/tests/view/61885686d7a085ad008ef20b closes https://github.com/official-stockfish/Stockfish/pull/3781 bench: 6547978 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: Mon Nov 8 13:03:52 2021 +0100 Timestamp: 1636373032 Reduce use of lazyEval In case the evaluation at root is large, discourage the use of lazyEval. This fixes https://github.com/official-stockfish/Stockfish/issues/3772 or at least improves it significantly. In this case, poor play with large odds can be observed, in extreme cases leading to a loss despite large advantage: r1bq1b1r/ppp3p1/3p1nkp/n3p3/2B1P2N/2NPB3/PPP2PPP/R3K2R b KQ - 5 9 With this patch the poor move is only considered up to depth 13, in master up to depth 28. The patch did not pass at LTC with Elo gainer bounds, but with slightly positive Elo nevertheless (95% LOS). STC: LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 40368 W: 10318 L: 10041 D: 20009 Elo +2.38 Ptnml(0-2): 103, 4493, 10725, 4750, 113 https://tests.stockfishchess.org/tests/view/61800ad259e71df00dcc420d LTC: LLR: -2.94 (-2.94,2.94) <0.50,3.00> Total: 212288 W: 52997 L: 52692 D: 106599 Elo +0.50 Ptnml(0-2): 112, 22038, 61549, 22323, 122 https://tests.stockfishchess.org/tests/view/618050d959e71df00dcc426d closes https://github.com/official-stockfish/Stockfish/pull/3780 Bench: 7127040 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: Fri Nov 5 22:22:30 2021 +0100 Timestamp: 1636147350 Tweak initial aspiration window. Maintain for each root move an exponential average of the search value with a weight ratio of 2:1 (new value vs old values). Then the average score is used as the center of the initial aspiration window instead of the previous score. Stats indicate (see PR) that the deviation for previous score is in general greater than using average score, so later seems a better estimation of the next search value. This is probably the reason this patch succeded besides smoothing the sometimes wild swings in search score. An additional observation is that at higher depth previous score is above but average score below zero. So for average score more/less fail/low highs should be occur than previous score. STC: LLR: 2.97 (-2.94,2.94) <0.00,2.50> Total: 59792 W: 15106 L: 14792 D: 29894 Elo +1.82 Ptnml(0-2): 144, 6718, 15869, 7010, 155 https://tests.stockfishchess.org/tests/view/61841612d7a085ad008eef06 LTC: LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 46448 W: 11835 L: 11537 D: 23076 Elo +2.23 Ptnml(0-2): 21, 4756, 13374, 5050, 23 https://tests.stockfishchess.org/tests/view/618463abd7a085ad008eef3e closes https://github.com/official-stockfish/Stockfish/pull/3776 Bench: 6719976 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: Fri Nov 5 22:20:37 2021 +0100 Timestamp: 1636147237 do not store qsearch positions in TT as exact. in qsearch don't store positions in TT with the exact flag. passed STC: https://tests.stockfishchess.org/tests/view/617f9a29af49befdeee40231 LLR: 2.95 (-2.94,2.94) <-2.25,0.25> Total: 155568 W: 39003 L: 39022 D: 77543 Elo -0.04 Ptnml(0-2): 403, 17854, 41305, 17803, 419 passed LTC: https://tests.stockfishchess.org/tests/view/6180d47259e71df00dcc42a5 LLR: 2.94 (-2.94,2.94) <-2.25,0.25> Total: 79640 W: 19993 L: 19910 D: 39737 Elo +0.36 Ptnml(0-2): 37, 8356, 22957, 8427, 43 closes https://github.com/official-stockfish/Stockfish/pull/3775 Bench: 7531210 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: Fri Nov 5 22:18:59 2021 +0100 Timestamp: 1636147139 Do more reductions at Pv nodes with low delta This patch increases reduction for PvNodes that have their delta (difference between beta and alpha) significantly reduced compared to what it was at root. passed STC https://tests.stockfishchess.org/tests/view/617f9063af49befdeee40226 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 220840 W: 55752 L: 55150 D: 109938 Elo +0.95 Ptnml(0-2): 583, 24982, 58712, 25536, 607 passed LTC https://tests.stockfishchess.org/tests/view/61815de959e71df00dcc42ed LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 79000 W: 19937 L: 19562 D: 39501 Elo +1.65 Ptnml(0-2): 36, 8190, 22674, 8563, 37 closes https://github.com/official-stockfish/Stockfish/pull/3774 bench: 6717808 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: lonfom169
Date: Fri Nov 5 22:15:53 2021 +0100 Timestamp: 1636146953 More futility pruning Expand maximum allowed eval by 50% in futility pruning, above the VALUE_KNOWN_WIN. STC: LLR: 2.95 (-2.94,2.94) <-0.50,2.50> Total: 128208 W: 32534 L: 32192 D: 63482 Elo +0.93 Ptnml(0-2): 298, 13484, 36216, 13790, 316 https://tests.stockfishchess.org/tests/view/6179c069a9b1d8fbcc4ee716 LTC: LLR: 2.96 (-2.94,2.94) <0.50,3.50> Total: 89816 W: 22645 L: 22265 D: 44906 Elo +1.47 Ptnml(0-2): 41, 8404, 27650, 8760, 53 https://tests.stockfishchess.org/tests/view/617ad728f411ea45cc39f895 closes https://github.com/official-stockfish/Stockfish/pull/3767 bench: 6804175 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: Mon Nov 1 06:28:37 2021 +0100 Timestamp: 1635744517 Restore development version 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: xefoci7612
Date: Sun Oct 31 22:43:38 2021 +0100 Timestamp: 1635716618 Simplify Skill implementation Currently we handle the UCI_Elo with a double randomization. This seems not necessary and a bit involuted. This patch removes the first randomization and unifies the 2 cases. closes https://github.com/official-stockfish/Stockfish/pull/3769 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: Michel Van den Bergh
Date: Sun Oct 31 22:40:41 2021 +0100 Timestamp: 1635716441 Do not output to stderr during the build. To help with debugging, the worker sends the output of stderr (suitable truncated) to the action log on the server, in case a build fails. For this to work it is important that there is no spurious output to stderr. closes https://github.com/official-stockfish/Stockfish/pull/3773 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: Stefan Geschwentner
Date: Sun Oct 31 22:31:55 2021 +0100 Timestamp: 1635715915 Do more deeper LMR searches. At expected cut nodes allow at least one ply deeper LMR search for the first seventh moves. STC: LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 42880 W: 10964 L: 10738 D: 21178 Elo +1.83 Ptnml(0-2): 105, 4565, 11883, 4773, 114 https://tests.stockfishchess.org/tests/view/6179abd7a9b1d8fbcc4ee6f4 LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 66872 W: 16930 L: 16603 D: 33339 Elo +1.70 Ptnml(0-2): 36, 6509, 20024, 6826, 41 https://tests.stockfishchess.org/tests/view/617a30fb2fbca9ca65972b5e closes https://github.com/official-stockfish/Stockfish/pull/3770 Bench: 6295536 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: Sun Oct 31 22:30:01 2021 +0100 Timestamp: 1635715801 Widen the aspiration window for larger evals passed STC LLR: 2.93 (-2.94,2.94) <-0.50,2.50> Total: 36840 W: 9359 L: 9134 D: 18347 Elo +2.12 Ptnml(0-2): 111, 4130, 9722, 4337, 120 https://tests.stockfishchess.org/tests/view/617c601301c6d0988731d10a passed LTC LLR: 2.98 (-2.94,2.94) <0.50,3.50> Total: 64824 W: 16377 L: 16043 D: 32404 Elo +1.79 Ptnml(0-2): 27, 6712, 18618, 7010, 45 https://tests.stockfishchess.org/tests/view/617c720d01c6d0988731d114 closes https://github.com/official-stockfish/Stockfish/pull/3768 Bench: 7683058 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 28 07:38:19 2021 +0200 Timestamp: 1635399499 Stockfish 14.1 Official release version of Stockfish 14.1 Bench: 6334068 --- Today, we have the pleasure to announce Stockfish 14.1. As usual, downloads will be freely available at stockfishchess.org/download [1]. With Stockfish 14.1 our users get access to the strongest chess engine available today. In the period leading up to this release, Stockfish convincingly won several chess engine tournaments, including the TCEC 21 superfinal, the TCEC Cup 9, and the Computer Chess Championship for Fischer Random Chess (Chess960). In the latter tournament, Stockfish was undefeated in 599 out of 600 games played. Compared to Stockfish 14, this release introduces a more advanced NNUE architecture and various search improvements. In self play testing, using a book of balanced openings, Stockfish 14.1 wins three times more game pairs than it loses [2]. At this high level, draws are very common, so the Elo difference to Stockfish 14 is about 17 Elo. The NNUE evaluation method, introduced to top level chess with Stockfish 12 about one year ago [3], has now been adopted by several other strong CPU based chess engines. The Stockfish project builds on a thriving community of enthusiasts (thanks everybody!) that contribute their expertise, time, and resources to build a free and open-source chess engine that is robust, widely available, and very strong. We invite our chess fans to join the fishtest testing framework and programmers to contribute to the project [4]. Stay safe and enjoy chess! The Stockfish team [1] https://stockfishchess.org/download/ [2] https://tests.stockfishchess.org/tests/view/6175c320af70c2be1788fa2b [3] https://github.com/official-stockfish/Stockfish/discussions/3628 [4] https://stockfishchess.org/get-involved/ 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: Mon Oct 25 12:26:44 2021 +0200 Timestamp: 1635157604 Fix sometimes incorrect key for prefetches STC https://tests.stockfishchess.org/tests/view/61737b4f6ce927be32558401 LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 138712 W: 34914 L: 34942 D: 68856 Elo -0.07 Ptnml(0-2): 421, 14817, 38894, 14817, 407 Very minor tweak since Position::key() depends on the 50 move rule counter. Comments: https://github.com/mstembera/Stockfish/commit/cddde31eed505cdf0c4fc8ff96b89f6e39c797e1 closes https://github.com/official-stockfish/Stockfish/pull/3759 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: Sun Oct 24 22:17:55 2021 +0200 Timestamp: 1635106675 Adjust ButterflyHistory decay parameter passed STC: LLR: 2.98 (-2.94,2.94) <-0.50,2.50> Total: 26680 W: 6807 L: 6593 D: 13280 Elo +2.79 Ptnml(0-2): 73, 3007, 6989, 3175, 96 https://tests.stockfishchess.org/tests/view/6174094e6ce927be32558441 passed LTC: LLR: 2.98 (-2.94,2.94) <0.50,3.50> Total: 21104 W: 5403 L: 5185 D: 10516 Elo +3.59 Ptnml(0-2): 8, 2160, 6001, 2372, 11 https://tests.stockfishchess.org/tests/view/61744927351812fe5f969864 closes https://github.com/official-stockfish/Stockfish/pull/3761 Bench: 6334068 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stefan Geschwentner
Date: Sun Oct 24 22:13:47 2021 +0200 Timestamp: 1635106427 Double extend search even more via LMR Allow now for the first five moves a two plies deeper LMR search. STC: LLR: 2.96 (-2.94,2.94) <-2.50,0.50> Total: 99608 W: 25143 L: 25115 D: 49350 Elo +0.10 Ptnml(0-2): 291, 11444, 26328, 11428, 313 https://tests.stockfishchess.org/tests/view/61718c9438cb9784038af8d7 LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 52064 W: 13234 L: 13145 D: 25685 Elo +0.59 Ptnml(0-2): 35, 5431, 15014, 5514, 38 https://tests.stockfishchess.org/tests/view/6171e13e38cb9784038af928 closes https://github.com/official-stockfish/Stockfish/pull/3760 Bench: 7222293 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: bmc4
Date: Sun Oct 24 22:08:28 2021 +0200 Timestamp: 1635106108 Simplify LMR multiThread condition STC (8 threads): LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 110584 W: 27818 L: 27807 D: 54959 Elo +0.03 Ptnml(0-2): 156, 12089, 30791, 12100, 156 https://tests.stockfishchess.org/tests/view/6172ef436ce927be325583a9 LTC (8 threads): LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 23632 W: 6025 L: 5903 D: 11704 Elo +1.79 Ptnml(0-2): 5, 2292, 7100, 2414, 5 https://tests.stockfishchess.org/tests/view/6173cf096ce927be32558412 closes https://github.com/official-stockfish/Stockfish/pull/3757 No functional change (in the single-threaded case) Bench: 6689428 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 Oct 23 12:27:32 2021 +0200 Timestamp: 1634984852 Tuning of a Null Move Parameter STC: LLR: 2.99 (-2.94,2.94) <-0.50,2.50> Total: 78744 W: 19956 L: 19664 D: 39124 Elo +1.29 Ptnml(0-2): 259, 9005, 20573, 9255, 280 https://tests.stockfishchess.org/tests/view/6172017a38cb9784038af947 LTC: LLR: 2.95 (-2.94,2.94) <0.50,3.50> Total: 68528 W: 17309 L: 16964 D: 34255 Elo +1.75 Ptnml(0-2): 41, 7194, 19455, 7527, 47 https://tests.stockfishchess.org/tests/view/6172994d38cb9784038af983 closes https://github.com/official-stockfish/Stockfish/pull/3756 bench: 6689428 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Windows 32 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: bmc4
Date: Sat Oct 23 12:23:29 2021 +0200 Timestamp: 1634984609 Increase TTdepth acceptance some Threads Increase TTdepth acceptance only on half of the Threads STC: LLR: 2.96 (-2.94,2.94) <-0.50,2.50> Total: 19272 W: 4956 L: 4766 D: 9550 Elo +3.43 Ptnml(0-2): 25, 1989, 5423, 2169, 30 https://tests.stockfishchess.org/tests/view/6172be6238cb9784038af9a7 LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.50> Total: 23688 W: 6111 L: 5897 D: 11680 Elo +3.14 Ptnml(0-2): 2, 2275, 7081, 2479, 7 https://tests.stockfishchess.org/tests/view/6172e32938cb9784038af9c7 closes https://github.com/official-stockfish/Stockfish/pull/3754 No functional change in the single-threaded case 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: Stefano Cardanobile
Date: Sat Oct 23 12:22:02 2021 +0200 Timestamp: 1634984522 Rewrite NNUE evaluation adjustments Make the eval code in the evaluate_nnue.cpp more similar to the rest of the codebase: * remove multiple variable assignment * make if conditions explicit and indent on multiple lines passed STC LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 59032 W: 14834 L: 14751 D: 29447 Elo +0.49 Ptnml(0-2): 176, 6310, 16459, 6397, 174 https://tests.stockfishchess.org/tests/view/616f250540f619782fd4f76d closes https://github.com/official-stockfish/Stockfish/pull/3753 No functional change see source |