| 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: VoyagerOne
Date: Fri Dec 2 20:05:50 2022 +0100 Timestamp: 1670007950 Simply do full sort on captures. STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 42712 W: 11413 L: 11203 D: 20096 Elo +1.71 Ptnml(0-2): 145, 4661, 11544, 4851, 155 https://tests.stockfishchess.org/tests/view/6384df57d2b9c924c4c53900 LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 239072 W: 64065 L: 64067 D: 110940 Elo -0.00 Ptnml(0-2): 106, 23735, 71859, 23727, 109 https://tests.stockfishchess.org/tests/view/63851120d2b9c924c4c541ee closes https://github.com/official-stockfish/Stockfish/pull/4249 Bench: 3467381 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: VoyagerOne
Date: Fri Dec 2 20:03:49 2022 +0100 Timestamp: 1670007829 Remove PvNode Parameter for cutoff LMR STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 198520 W: 52673 L: 52632 D: 93215 Elo +0.07 Ptnml(0-2): 645, 22241, 53499, 22178, 697 https://tests.stockfishchess.org/tests/view/63746e8f9849fa7a36a6698f LTC: LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 253568 W: 67487 L: 67501 D: 118580 Elo -0.02 Ptnml(0-2): 109, 25222, 76141, 25198, 114 https://tests.stockfishchess.org/tests/view/63839859d2b9c924c4c4feb7 closes https://github.com/official-stockfish/Stockfish/pull/4248 Bench: 3733322 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Guenther Demetz
Date: Wed Nov 23 21:45:06 2022 +0100 Timestamp: 1669236306 Correctly output lowerbound/upperbound in threaded searches fixes the lowerbound/upperbound output by taking the alpha,beta bracket into account also if a bestThread is selected that is different from the master thread. Instead of keeping track which bounds where used in the specific search, in this version we simply store the quality (exact, upperbound, lowerbound) of the score along with the actual score as information on rootMove. closes https://github.com/official-stockfish/Stockfish/pull/4239 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: peregrineshahin
Date: Wed Nov 23 21:36:22 2022 +0100 Timestamp: 1669235782 Simplify both quiet check evasions' conditions passed Non-regression STC: https://tests.stockfishchess.org/tests/view/6370b647f1b748d4819e0b64 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 162904 W: 43249 L: 43171 D: 76484 Elo +0.17 Ptnml(0-2): 491, 17089, 46220, 17155, 497 closes https://github.com/official-stockfish/Stockfish/pull/4228 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: VoyagerOne
Date: Wed Nov 23 21:25:14 2022 +0100 Timestamp: 1669235114 Skip full depth search in LMR depending on depth dynamically adjust newDepth, and skip full depth search if newDepth doesn't exceed the previous search depth. This affects the used newDepth for future searches, and influences the stat bonus for the move. Passed STC: https://tests.stockfishchess.org/tests/view/63795500aa34433735bc1cfe LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 112776 W: 30082 L: 29663 D: 53031 Elo +1.29 Ptnml(0-2): 352, 12453, 30423, 12744, 416 Passed LTC: https://tests.stockfishchess.org/tests/view/6379ea39aa34433735bc2f9b LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 83576 W: 22559 L: 22169 D: 38848 Elo +1.62 Ptnml(0-2): 38, 8011, 25303, 8395, 41 closes https://github.com/official-stockfish/Stockfish/pull/4240 Bench: 4390318 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 20 10:00:42 2022 +0100 Timestamp: 1668934842 Update Top CPU Contributors list as of 2022-11-19. Thanks! closes https://github.com/official-stockfish/Stockfish/pull/4234 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 20 09:59:35 2022 +0100 Timestamp: 1668934775 Update WDL model for current SF This updates the WDL model based on the LTC statistics (2M games). Relatively small change, note that this also adjusts the NormalizeToPawnValue (now 361), to keep win prob at 50% for 100cp. closes https://github.com/official-stockfish/Stockfish/pull/4236 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 20 09:58:07 2022 +0100 Timestamp: 1668934687 Fix a missing conversion This conversion to cp was overlooked. closes https://github.com/official-stockfish/Stockfish/pull/4235 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: VoyagerOne
Date: Sat Nov 19 09:29:04 2022 +0100 Timestamp: 1668846544 Simplification away Cutoff Reset STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 150184 W: 39913 L: 39819 D: 70452 Elo +0.22 Ptnml(0-2): 493, 16796, 40474, 16782, 547 https://tests.stockfishchess.org/tests/view/63723e9e54d69a2f33911d3c LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 58880 W: 15890 L: 15717 D: 27273 Elo +1.02 Ptnml(0-2): 35, 5765, 17659, 5954, 27 https://tests.stockfishchess.org/tests/view/6373baf49849fa7a36a65427 closes https://github.com/official-stockfish/Stockfish/pull/4231 Bench: 4035152 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: Sat Nov 19 09:23:26 2022 +0100 Timestamp: 1668846206 Do shallower search in case of lmr being not successful enough In case of a move passing LMR but it results being not too far from the current best search result produce a full depth search with reduced depth. Original idea by lonfom169 . Passed STC: https://tests.stockfishchess.org/tests/view/6373409b54d69a2f33913fbd LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 169504 W: 45351 L: 44848 D: 79305 Elo +1.03 Ptnml(0-2): 598, 18853, 45353, 19344, 604 Passed LTC: https://tests.stockfishchess.org/tests/view/6374c58528e3405283eb8d2d LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 51144 W: 13802 L: 13471 D: 23871 Elo +2.25 Ptnml(0-2): 19, 4928, 15362, 5229, 34 closes https://github.com/official-stockfish/Stockfish/pull/4230 bench 4277005 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 Nov 7 21:42:04 2022 +0100 Timestamp: 1667853724 speedup CI Github Actions allows us to use up to 20 workers. This way we can launch multiple different checks at the same time and optimize the overall time the CI takes a bit. closes https://github.com/official-stockfish/Stockfish/pull/4223 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: Mon Nov 7 08:00:05 2022 +0100 Timestamp: 1667804405 Remove trend Simplify trend away. passed Non-regression STC: https://tests.stockfishchess.org/tests/view/63642a63a90afcecbd1cb887 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 130000 W: 34683 L: 34567 D: 60750 Elo +0.31 Ptnml(0-2): 455, 14424, 35135, 14522, 464 passed Non-regression LTC: https://tests.stockfishchess.org/tests/view/636566fda90afcecbd1cded9 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 81592 W: 21938 L: 21787 D: 37867 Elo +0.64 Ptnml(0-2): 42, 8035, 24490, 8188, 41 closes https://github.com/official-stockfish/Stockfish/pull/4222 Bench: 4239512 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 Nov 7 07:56:58 2022 +0100 Timestamp: 1667804218 Change versioning and save binaries as CI artifacts For development versions of Stockfish, the version will now look like dev-20221107-dca9a0533 indicating a development version, the date of the last commit, and the git SHA of that commit. If git is not available, the fallback is the date of compilation. Releases will continue to be versioned as before. Additionally, this PR extends the CI to create binary artifacts, i.e. pushes to master will automatically build Stockfish and upload the binaries to github. closes https://github.com/official-stockfish/Stockfish/pull/4220 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: Sat Nov 5 09:15:53 2022 +0100 Timestamp: 1667636153 Normalize evaluation Normalizes the internal value as reported by evaluate or search to the UCI centipawn result used in output. This value is derived from the win_rate_model() such that Stockfish outputs an advantage of "100 centipawns" for a position if the engine has a 50% probability to win from this position in selfplay at fishtest LTC time control. The reason to introduce this normalization is that our evaluation is, since NNUE, no longer related to the classical parameter PawnValueEg (=208). This leads to the current evaluation changing quite a bit from release to release, for example, the eval needed to have 50% win probability at fishtest LTC (in cp and internal Value): June 2020 : 113cp (237) June 2021 : 115cp (240) April 2022 : 134cp (279) July 2022 : 167cp (348) With this patch, a 100cp advantage will have a fixed interpretation, i.e. a 50% win chance. To keep this value steady, it will be needed to update the win_rate_model() from time to time, based on fishtest data. This analysis can be performed with a set of scripts currently available at https://github.com/vondele/WLD_model fixes https://github.com/official-stockfish/Stockfish/issues/4155 closes https://github.com/official-stockfish/Stockfish/pull/4216 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: Sat Nov 5 09:15:14 2022 +0100 Timestamp: 1667636114 Mark variable as potentially unused fixes CI when compiled with -Werror closes https://github.com/official-stockfish/Stockfish/pull/4221 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: kurt22i
Date: Sun Oct 30 16:19:09 2022 +0100 Timestamp: 1667143149 Adjust reduction less at medium depths This patch dampens the reduction increase/decrease from statScore at mid-range depths. Inspired by patterns noticed in this tune: https://tests.stockfishchess.org/tests/view/635188930e5f47a8d0ffe8f5 Passed STC: https://tests.stockfishchess.org/tests/view/63599dfd6b27ef94d9ec04af LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 87464 W: 23519 L: 23134 D: 40811 Elo +1.53 Ptnml(0-2): 319, 9599, 23524, 9958, 332 Passed LTC: https://tests.stockfishchess.org/tests/view/635a73046b27ef94d9ec2313 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 154792 W: 41746 L: 41214 D: 71832 Elo +1.19 Ptnml(0-2): 79, 15181, 46349, 15703, 84 closes https://github.com/official-stockfish/Stockfish/pull/4213 Bench 4271738 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 Oct 30 16:17:49 2022 +0100 Timestamp: 1667143069 Update MacOS CI move to 12 following actions runner update deprecation (see https://github.com/actions/runner-images/issues/5583) closes https://github.com/official-stockfish/Stockfish/pull/4212 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: Clausable
Date: Thu Oct 27 08:15:46 2022 +0200 Timestamp: 1666851346 Fix README typos, update AUTHORS closes https://github.com/official-stockfish/Stockfish/pull/4208 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: dav1312
Date: Wed Oct 26 20:28:12 2022 +0200 Timestamp: 1666808892 Add issue template Add an issue template using GitHub's form schema https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-githubs-form-schema closes https://github.com/official-stockfish/Stockfish/pull/4210 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: Sun Oct 23 20:22:04 2022 +0200 Timestamp: 1666549324 Use TT moves more often in qsearch During the recapture phase of quiescence search (where we limit the generated moves to recaptures on the last seen capture square), the move picker will now emit the tt move, even if the tt move is not a recapture. Passed STC : https://tests.stockfishchess.org/tests/view/6350df2928d3a71cb1eef838 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 90280 W: 24001 L: 23845 D: 42434 Elo +0.60 Ptnml(0-2): 273, 9779, 24941, 9813, 334 Passed LTC : https://tests.stockfishchess.org/tests/view/6351308b28d3a71cb1ef06ce LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 104504 W: 27937 L: 27807 D: 48760 Elo +0.43 Ptnml(0-2): 54, 10378, 31260, 10504, 56 closes https://github.com/official-stockfish/Stockfish/pull/4206 Bench: 4540268 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: Clement
Date: Sun Oct 23 20:18:08 2022 +0200 Timestamp: 1666549088 Add RISC-V 64-bit support adds a riscv64 target architecture to the Makefile to support RISC-V 64-bit. Compiled and tested on VisionFive 2 board. closes https://github.com/official-stockfish/Stockfish/pull/4205 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 Oct 23 20:08:18 2022 +0200 Timestamp: 1666548498 enable bit manipulation instruction set 1 bmi1 enables the use of _blsr_u64 for pop_lsb, and is availabe when avx2 is. verified a small speedup (0.2 - 0.6%) closes https://github.com/official-stockfish/Stockfish/pull/4202 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: MinetaS
Date: Sun Oct 23 19:58:47 2022 +0200 Timestamp: 1666547927 Apply -flto-partition=one / -flto=full This patch fixes a potential bug derived from an incompatibility between LTO and top-level assembly code (INCBIN). Passed non-regression STC (master e90341f): LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 119352 W: 31986 L: 31862 D: 55504 Elo +0.36 Ptnml(0-2): 439, 12624, 33400, 12800, 413 https://tests.stockfishchess.org/tests/view/634aacf84bc7650f0755188b closes https://github.com/official-stockfish/Stockfish/pull/4201 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: Rodrigo Roim
Date: Sun Oct 16 12:58:48 2022 +0200 Timestamp: 1665917928 Fix tablebase probe for dtz >1000 w/o 50 move rule For qn4N1/6R1/3K4/8/B2k4/8/8/8 w - - 0 1, white loses with DTZ 1034. See https://syzygy-tables.info/?fen=qn4N1/6R1/3K4/8/B2k4/8/8/8_w_-_-_0_1 Prior to this fix, due to a too small hard-coded value, Stockfish interpreted this as winning. The new value picked (1<<18) is large enough to deal with the largest DTZ values that can be stored in the current syzygy format. closes https://github.com/official-stockfish/Stockfish/pull/4187 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: xoto10
Date: Sun Oct 16 11:51:41 2022 +0200 Timestamp: 1665913901 Adjust timeman constants Adjust timeman constants to use more time in early part of game. STC @ 10+0.1 th 1 : LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 93984 W: 25177 L: 24787 D: 44020 Elo +1.44 Ptnml(0-2): 350, 10096, 25729, 10448, 369 https://tests.stockfishchess.org/tests/live_elo/6339077135f43d649ff6162a LTC @ 60+0.6 th 1 : LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 329368 W: 88953 L: 88093 D: 152322 Elo +0.91 Ptnml(0-2): 170, 31457, 100594, 32269, 194 https://tests.stockfishchess.org/tests/live_elo/6339baed35f43d649ff63142 Sudden death 10+0 : LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 20400 W: 5908 L: 5588 D: 8904 Elo +5.45 Ptnml(0-2): 177, 2252, 5128, 2360, 283 https://tests.stockfishchess.org/tests/live_elo/6347c9384bc7650f07549ba7 Sudden death 10+0, no adjudication : LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 17920 W: 4755 L: 4442 D: 8723 Elo +6.07 Ptnml(0-2): 137, 1985, 4466, 2172, 200 https://tests.stockfishchess.org/tests/live_elo/634806e84bc7650f0754a639 closes https://github.com/official-stockfish/Stockfish/pull/4188 No functional change see source |