| 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: Viren6
Date: Fri Jan 26 21:15:07 2024 +0100 Timestamp: 1706300107 Use ttPv in depth condition of singular extensions This replaces the PvNode condition and tte Pv call previously with using the precomputed ttPv, and also removes the multiplier of 2. This new depth condition occurs with approximately equal frequency (47%) to the old depth condition (measured when the other conditions in the if are true), so non-linear scaling behaviour isn't expected. Passed Non-Reg STC: https://tests.stockfishchess.org/tests/view/65b0e132c865510db026da27 LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 243232 W: 62432 L: 62437 D: 118363 Elo -0.01 Ptnml(0-2): 910, 28937, 61900, 28986, 883 Passed Non-Reg LTC: https://tests.stockfishchess.org/tests/view/65b2053bc865510db026eea1 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 190596 W: 47666 L: 47618 D: 95312 Elo +0.09 Ptnml(0-2): 115, 21710, 51596, 21766, 111 closes https://github.com/official-stockfish/Stockfish/pull/5015 Bench: 1492957 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: Ahmed Kerimov
Date: Fri Jan 26 21:00:41 2024 +0100 Timestamp: 1706299241 Move OnChange callback in Option ctors Parameter 'f' is passed by value and only copied once. Moving it to avoid unnecessary copies. closes https://github.com/official-stockfish/Stockfish/pull/5014 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: Michael Chaly
Date: Fri Jan 26 20:55:16 2024 +0100 Timestamp: 1706298916 Do more double extensions Parameter tweak from Black Marlin chess engine. Choose a significantly lower value that triggers in 95% of cases, compared to the usual 84% in standard benchmark runs. Since the introduction by https://github.com/official-stockfish/Stockfish/commit/33a858eaa1f792b3413384a3d0993dba36aca92e this constant has only decreased in value over time. 2-16-17-18-21-22-25-26-52-71-75-93-140 Failed STC really fast: https://tests.stockfishchess.org/tests/view/65b11d05c865510db026df7b LLR: -2.94 (-2.94,2.94) <0.00,2.00> Total: 13216 W: 3242 L: 3485 D: 6489 Elo -6.39 Ptnml(0-2): 50, 1682, 3371, 1471, 34 Was reasonable at LTC: https://tests.stockfishchess.org/tests/view/65b13e20c865510db026e210 Elo: 1.18 ± 1.5 (95%) LOS: 94.3% Total: 50000 W: 12517 L: 12347 D: 25136 Elo +1.18 Ptnml(0-2): 31, 5598, 13579, 5754, 38 nElo: 2.45 ± 3.0 (95%) PairsRatio: 1.03 Passed VLTC with STC bounds: https://tests.stockfishchess.org/tests/view/65b18870c865510db026e769 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 30456 W: 7726 L: 7448 D: 15282 Elo +3.17 Ptnml(0-2): 6, 3111, 8717, 3387, 7 Passed VVLTC with LTC bounds: https://tests.stockfishchess.org/tests/view/65b20b95c865510db026eef0 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 36134 W: 9158 L: 8859 D: 18117 Elo +2.88 Ptnml(0-2): 3, 3455, 10850, 3758, 1 closes https://github.com/official-stockfish/Stockfish/pull/5013 Bench: 1503692 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: Fri Jan 26 20:52:26 2024 +0100 Timestamp: 1706298746 Move perft out of search This splits the logic of search and perft. Before, threads were started, which then constructed a search object, which then started perft and returned immediately. All of this is unnecessary, instead uci should start perft right away. closes https://github.com/official-stockfish/Stockfish/pull/5008 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 Jan 26 20:44:16 2024 +0100 Timestamp: 1706298256 Refactor history score calculation Passed STC: https://tests.stockfishchess.org/tests/view/65ad08b179aa8af82b979dd1 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 161376 W: 41582 L: 41498 D: 78296 Elo +0.18 Ptnml(0-2): 633, 19354, 40611, 19476, 614 Passed LTC: https://tests.stockfishchess.org/tests/view/65af966fc865510db026c0f0 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 116526 W: 29269 L: 29143 D: 58114 Elo +0.38 Ptnml(0-2): 71, 13252, 31509, 13342, 89 closes https://github.com/official-stockfish/Stockfish/pull/5006 Bench: 1317504 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 Jan 26 20:40:22 2024 +0100 Timestamp: 1706298022 Remove redundant max operation on lmrDepth Removed a restriction that prohibited history heuristics sum in futility pruning to exceed some negative value. Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 279040 W: 71095 L: 71143 D: 136802 Elo -0.06 Ptnml(0-2): 949, 33574, 70474, 33622, 901 https://tests.stockfishchess.org/tests/view/65aaef4c79aa8af82b977631 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 75156 W: 18884 L: 18715 D: 37557 Elo +0.78 Ptnml(0-2): 52, 8445, 20408, 8628, 45 https://tests.stockfishchess.org/tests/view/65ae7ef3c865510db026abf5 closes https://github.com/official-stockfish/Stockfish/pull/5004 Bench: 1566543 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: Sun Jan 21 12:49:30 2024 +0100 Timestamp: 1705837770 VLTC search tune Search parameters were tuned using 152k games at 180+1.8. Passed VLTC: https://tests.stockfishchess.org/tests/view/65a7a81979aa8af82b973a20 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 117338 W: 29244 L: 28848 D: 59246 Elo +1.17 Ptnml(0-2): 24, 12474, 33267, 12890, 14 Passed VVLTC: https://tests.stockfishchess.org/tests/view/65ab246679aa8af82b977982 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 28164 W: 7239 L: 6957 D: 13968 Elo +3.48 Ptnml(0-2): 3, 2651, 8490, 2937, 1 STC Elo estimate: https://tests.stockfishchess.org/tests/view/65ac7c0979aa8af82b9792a6 Elo: -0.53 ± 2.0 (95%) LOS: 30.4% Total: 30000 W: 7688 L: 7734 D: 14578 Elo -0.53 Ptnml(0-2): 102, 3617, 7614, 3559, 108 nElo: -1.03 ± 3.9 (95%) PairsRatio: 0.99 closes https://github.com/official-stockfish/Stockfish/pull/5003 Bench: 1235377 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: Sun Jan 21 12:45:03 2024 +0100 Timestamp: 1705837503 Update the WDL model Update the internal WDL model. After the dual net merge, the internal evaluations have drifted upwards a bit. With this PR `NormalizeToPawnValue` changes from `328` to `345`. The new model was fitted based on about 200M positions extracted from 3.4M fishtest LTC games from the last two weeks, involving SF versions from 6deb88728fb141e853243c2873ad0cda4dd19320 to current master. Apart from the WDL model parameter update, this PR implements the following changes: WDL Model: - an incorrect 8-move shift in master's WDL model has been fixed - the polynomials `p_a` and `p_b` are fitted over the move range [8, 120] - the coefficients for `p_a` and `p_b` are optimized by maximizing the probability of predicting the observed outcome (credits to @vondele) SF code: - for wdl values, move will be clamped to `max(8, min(120, move))` - no longer clamp the internal eval to [-4000,4000] - compute `NormalizeToPawnValue` with `round`, not `trunc` The PR only affects displayed `cp` and `wdl` values. closes https://github.com/official-stockfish/Stockfish/pull/5002 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: Shahin M. Shahin
Date: Sun Jan 21 12:42:28 2024 +0100 Timestamp: 1705837348 Refactor get_best_thread Make get_best_thread function easier to understand. Passed non-reg SMP STC: https://tests.stockfishchess.org/tests/view/65a91c6679aa8af82b975500 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 186000 W: 46379 L: 46325 D: 93296 Elo +0.10 Ptnml(0-2): 269, 21374, 49634, 21480, 243 closes https://github.com/official-stockfish/Stockfish/pull/5001 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: rn5f107s2
Date: Sun Jan 21 12:42:07 2024 +0100 Timestamp: 1705837327 Reduce futility_margin further when improving The idea of this is to unroll the futility_margin calculation to allow for the improving flag to have a greater effect on the futility margin. The current factor is 1.5 instead of the previous 1 resulting in a deduction of an extra margin/2 from futilit_margin if improving. The chosen value was not tuned, meaning that there is room for tweaking it. This patch is partially inspired by @Vizvezdenec, who, although quite different in execution, tested another idea where the futility_margin is lowered further when improving [1]. [1]: (first take) https://tests.stockfishchess.org/tests/view/65a56b1879aa8af82b97164b Passed STC: https://tests.stockfishchess.org/tests/live_elo/65a8bfc179aa8af82b974e3c LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 161152 W: 41321 L: 40816 D: 79015 Elo +1.09 Ptnml(0-2): 559, 19030, 40921, 19479, 587 Passed rebased LTC: https://tests.stockfishchess.org/tests/live_elo/65a8b9ef79aa8af82b974dc0 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 96024 W: 24172 L: 23728 D: 48124 Elo +1.61 Ptnml(0-2): 56, 10598, 26275, 11012, 71 closes https://github.com/official-stockfish/Stockfish/pull/5000 Bench: 1281703 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: Viren6
Date: Sun Jan 21 12:33:08 2024 +0100 Timestamp: 1705836788 Refactor ttPv reduction conditions closes https://github.com/official-stockfish/Stockfish/pull/4999 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 Jan 21 12:21:01 2024 +0100 Timestamp: 1705836061 Refactor NativeThread start_routine Removes the free function and fixes the formatting for the function call. closes https://github.com/official-stockfish/Stockfish/pull/4995 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: Viren6
Date: Wed Jan 17 18:56:37 2024 +0100 Timestamp: 1705514197 Improve ttPv reduction This patch allows a partial reduction decrease when a node is likely to fail low, and increases the reduction decrease when a node has failed high. Passed STC: https://tests.stockfishchess.org/tests/view/65a626e779aa8af82b9722bc LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 157824 W: 40332 L: 39835 D: 77657 Elo +1.09 Ptnml(0-2): 543, 18617, 40098, 19108, 546 Passed LTC: https://tests.stockfishchess.org/tests/view/65a7290279aa8af82b97328a LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 57228 W: 14475 L: 14111 D: 28642 Elo +2.21 Ptnml(0-2): 34, 6278, 15633, 6628, 41 closes https://github.com/official-stockfish/Stockfish/pull/4994 Bench: 1364759 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 Jan 17 18:55:44 2024 +0100 Timestamp: 1705514144 Remove threatenedByPawn from rook threat Can be simplified away. Passed STC: https://tests.stockfishchess.org/tests/view/65a3fa4179aa8af82b96face LLR: 2.92 (-2.94,2.94) <-1.75,0.25> Total: 30592 W: 7903 L: 7674 D: 15015 Elo +2.60 Ptnml(0-2): 96, 3590, 7711, 3787, 112 Passed LTC: https://tests.stockfishchess.org/tests/view/65a42b9a79aa8af82b96fe88 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 73656 W: 18382 L: 18212 D: 37062 Elo +0.80 Ptnml(0-2): 47, 8287, 19981, 8475, 38 closes https://github.com/official-stockfish/Stockfish/pull/4993 Bench: 1430061 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: Wed Jan 17 18:51:03 2024 +0100 Timestamp: 1705513863 Refactor code for correcting unadjustedStaticEval Passed non-regression STC: https://tests.stockfishchess.org/tests/live_elo/65a4df6a79aa8af82b970ca0 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 43328 W: 11103 L: 10892 D: 21333 Elo +1.69 Ptnml(0-2): 120, 4920, 11407, 5063, 154 https://github.com/official-stockfish/Stockfish/pull/4992 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: Torsten Hellwig
Date: Wed Jan 17 18:32:20 2024 +0100 Timestamp: 1705512740 Fix dotprod detection This fixes the detection of dotprod capable CPUs. Previously it looked for the `dotprod` flag, but this does not exist (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/arch/arm64/kernel/cpuinfo.c#n50). The correct flag that specifies the dotprod capability is the `asimddp` flag. fixes #4931 closes https://github.com/official-stockfish/Stockfish/pull/4991 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: Shahin M. Shahin
Date: Wed Jan 17 18:12:16 2024 +0100 Timestamp: 1705511536 Fix mated-in behaviour This addresses the issue where Stockfish may output non-proven checkmate scores if the search is prematurely halted, either due to a time control or node limit, before it explores other possibilities where the checkmate score could have been delayed or refuted. The fix also replaces staving off from proven mated scores in a multithread environment making use of the threads instead of a negative effect with multithreads (1t was better in proving mated in scores than more threads). Issue reported on mate tracker repo by and this PR is co-authored with @robertnurnberg Special thanks to @AndyGrant for outlining that a fix is eventually possible. Passed Adj off SMP STC: https://tests.stockfishchess.org/tests/view/65a125d779aa8af82b96c3eb LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 303256 W: 75823 L: 75892 D: 151541 Elo -0.08 Ptnml(0-2): 406, 35269, 80395, 35104, 454 Passed Adj off SMP LTC: https://tests.stockfishchess.org/tests/view/65a37add79aa8af82b96f0f7 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 56056 W: 13951 L: 13770 D: 28335 Elo +1.12 Ptnml(0-2): 11, 5910, 16002, 6097, 8 Passed all tests in matetrack without any better mate for opponent found in 1t and multithreads. Fixed bugs in https://github.com/official-stockfish/Stockfish/pull/4976 closes https://github.com/official-stockfish/Stockfish/pull/4990 Bench: 1308279 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: Disservin
Date: Wed Jan 17 18:06:20 2024 +0100 Timestamp: 1705511180 Update installation guide links in CONTRIBUTING.md Link to more user friendly installation guides, these are shorter and easier to follow. closes https://github.com/official-stockfish/Stockfish/pull/4985 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 Jan 17 18:05:00 2024 +0100 Timestamp: 1705511100 Remove global TB variables from search.cpp Follow up cleanup of #4968, removes the global variables from search and instead uses a dedicated tb config struct. closes https://github.com/official-stockfish/Stockfish/pull/4982 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: Wed Jan 17 18:04:29 2024 +0100 Timestamp: 1705511069 Remove some outdated SIMD functions Since https://github.com/official-stockfish/Stockfish/pull/4391 the x2 SIMD functions no longer serve any useful purpose. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/659cf42579aa8af82b966d55 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 67392 W: 17222 L: 17037 D: 33133 Elo +0.95 Ptnml(0-2): 207, 7668, 17762, 7851, 208 closes https://github.com/official-stockfish/Stockfish/pull/4974 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 Jan 14 10:46:13 2024 +0100 Timestamp: 1705225573 Add ignoreRevsFile to CONTRIBUTING.md closes https://github.com/official-stockfish/Stockfish/pull/4980 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 Jan 14 10:46:13 2024 +0100 Timestamp: 1705225573 Remove the dependency on a Worker from evaluate Also remove dead code, `rootSimpleEval` is no longer used since the introduction of dual net. `iterBestValue` is also no longer used in evaluate and can be reduced to a local variable. closes https://github.com/official-stockfish/Stockfish/pull/4979 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 Jan 14 10:46:13 2024 +0100 Timestamp: 1705225573 Fix UCI options Fixes the type for 'Clear Hash' and uses MAX_MOVES for 'MultiPV' as we had before. 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 Jan 14 00:30:06 2024 +0100 Timestamp: 1705188606 Remove unused method init() is no longer used, and was previously replaced by the clear function. fixes https://github.com/official-stockfish/Stockfish/issues/4981 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: Sat Jan 13 19:40:53 2024 +0100 Timestamp: 1705171253 Simplify bad quiets The main difference is that instead of returning the first bad quiet as a good one we fall through. This is actually more correct and simpler to implement. Non regression STC: https://tests.stockfishchess.org/tests/view/659bbb3479aa8af82b964ec7 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 150944 W: 38399 L: 38305 D: 74240 Elo +0.22 Ptnml(0-2): 485, 18042, 38298, 18188, 459 Non regression LTC: https://tests.stockfishchess.org/tests/view/659c6e6279aa8af82b9660eb LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 192060 W: 47871 L: 47823 D: 96366 Elo +0.09 Ptnml(0-2): 144, 21912, 51845, 22010, 119 The cutoff is now -8K instead of -7.5K. -7.5K failed. https://tests.stockfishchess.org/tests/view/659a1f4b79aa8af82b962a0e This was likely a false negative. closes https://github.com/official-stockfish/Stockfish/pull/4975 Bench: 1308279 see source |