| !! latest version !! 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 Apr 13 22:05:19 2024 +0200 Timestamp: 1713038719 Fix wrong sign for 200 TB score Fix another case of 9032c6cbe74ccf7e8963755501e7e6cc473ae471 * TB values can have a distance of 0, mainly when we are in a tb position but haven't found mate. * Add a missing whitespace to UCIEngine::on_update_no_moves() Closes https://github.com/official-stockfish/Stockfish/pull/5172 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: Fri Apr 12 19:37:39 2024 +0200 Timestamp: 1712943459 Remove duplicated Position object in UCIEngine Also fixes searchmoves. Drop the need of a Position object in uci.cpp. A side note, it is still required for the static functions, but these should be moved to a different namespace/class later on, since sf kinda relies on them. closes https://github.com/official-stockfish/Stockfish/pull/5169 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: Fri Apr 12 18:11:54 2024 +0200 Timestamp: 1712938314 Fix some more UCI output further fall-out of the refactoring, fixes: * the position object in UCI is not never getting updated if position token is used * duplicate string of " wdl " See also: https://discord.com/channels/435943710472011776/1032922913499783169/1228227522945351690 https://discord.com/channels/435943710472011776/813919248455827515/1228288106449338398 closes https://github.com/official-stockfish/Stockfish/pull/5168 No functional change Co-Authored-By: disservin <45608332+> 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: Fri Apr 12 09:30:34 2024 +0200 Timestamp: 1712907034 Fix wrong mate sign introduced yesterday by the UCI refactoring 9032c6cbe fixes #5166 closes https://github.com/official-stockfish/Stockfish/pull/5167 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 Apr 11 22:47:40 2024 +0200 Timestamp: 1712868460 Simplify the depth-dependent part of the best value adjustment formula in main search Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 139648 W: 36171 L: 36061 D: 67416 Elo +0.27 Ptnml(0-2): 545, 16685, 35282, 16739, 573 https://tests.stockfishchess.org/tests/view/660d953b8ff4a059828d625d Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 222894 W: 56519 L: 56505 D: 109870 Elo +0.02 Ptnml(0-2): 112, 25145, 60971, 25055, 164 https://tests.stockfishchess.org/tests/view/660fd4afbfeb43334bf7d558 closes https://github.com/official-stockfish/Stockfish/pull/5164 bench: 1479416 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: gab8192
Date: Thu Apr 11 22:43:00 2024 +0200 Timestamp: 1712868180 Remove an useless assignment The assignment (ss + 1)->excludedMove = Move::none() can be simplified away because when that line is reached, (ss + 1)->excludedMove is always already none. The only moment stack[x]->excludedMove is modified, is during singular search, but it is reset to none right after the singular search is finished. closes https://github.com/official-stockfish/Stockfish/pull/5153 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: Thu Apr 11 22:41:35 2024 +0200 Timestamp: 1712868095 Remove COMPILER from Makefile The same functionality is available by using COMPCXX and having another variable which does the same is just confusing. There was only one mention on Stockfish Wiki about this which has been changed to COMPCXX. closes https://github.com/official-stockfish/Stockfish/pull/5154 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: Thu Apr 11 22:38:38 2024 +0200 Timestamp: 1712867918 Avoid permuting inputs during transform() Avoid permuting inputs during transform() and instead do it once at load time. Affects AVX2 and newer Intel architectures only. https://tests.stockfishchess.org/tests/view/661306613eb00c8ccc0033c7 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 108480 W: 28319 L: 27898 D: 52263 Elo +1.35 Ptnml(0-2): 436, 12259, 28438, 12662, 445 speedups measured such as e.g. ``` Result of 100 runs ================== base (./stockfish.master ) = 1241128 +/- 3757 test (./stockfish.patch ) = 1247713 +/- 3689 diff = +6585 +/- 2583 speedup = +0.0053 P(speedup > 0) = 1.0000 ``` closes https://github.com/official-stockfish/Stockfish/pull/5160 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 Apr 11 22:23:52 2024 +0200 Timestamp: 1712867032 VVLTC search tune Parameters were tuned in 3 stages: * Using an earlier L1-3072 net, and with triple extension margin manually set to 0: https://tests.stockfishchess.org/tests/view/65ffdf5d0ec64f0526c544f2 (~30k games) * Continue tuning, but with the previous master net (L1-2560). https://tests.stockfishchess.org/tests/view/660663f00ec64f0526c59c41 (~27k games) * Starting with the parameters from step 2, use the current L1-3072 net, and allow the triple extension margin to be tuned starting from 0: https://tests.stockfishchess.org/tests/view/660c16b8216a13d9498e7536 (40k games) Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/66115eacbfeb43334bf7eddd LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 27138 W: 7045 L: 6789 D: 13304 Elo +3.28 Ptnml(0-2): 1, 2421, 8471, 2673, 3 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/661483623eb00c8ccc0049c1 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 26242 W: 6807 L: 6535 D: 12900 Elo +3.60 Ptnml(0-2): 0, 2353, 8143, 2625, 0 STC Elo estimate: https://tests.stockfishchess.org/tests/view/66175ca55a4693796d96608c Elo: -10.53 ± 2.4 (95%) LOS: 0.0% Total: 21584 W: 5294 L: 5948 D: 10342 Elo -10.53 Ptnml(0-2): 102, 2937, 5363, 2293, 97 nElo: -19.99 ± 4.7 (95%) PairsRatio: 0.79 closes https://github.com/official-stockfish/Stockfish/pull/5162 Bench: 1381387 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 Apr 5 21:03:58 2024 +0200 Timestamp: 1712343838 Transform search output to engine callbacks Part 2 of the Split UCI into UCIEngine and Engine refactor. This creates function callbacks for search to use when an update should occur. The benching in uci.cpp for example does this to extract the total nodes searched. 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: Thu Apr 4 00:15:17 2024 +0200 Timestamp: 1712182517 Split UCI into UCIEngine and Engine This is another refactor which aims to decouple uci from stockfish. A new engine class manages all engine related logic and uci is a "small" wrapper around it. In the future we should also try to remove the need for the Position object in the uci and replace the options with an actual options struct instead of using a map. Also convert the std::string's in the Info structs a string_view. closes #5147 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: Tue Apr 2 08:49:48 2024 +0200 Timestamp: 1712040588 Update NNUE architecture to SFNNv9 and net nn-ae6a388e4a1a.nnue Part 1: PyTorch Training, linrock Trained with a 10-stage sequence from scratch, starting in May 2023: https://github.com/linrock/nnue-tools/blob/master/exp-sequences/3072-10stage-SFNNv9.yml While the training methods were similar to the L1-2560 training sequence, the last two stages introduced min-v2 binpacks, where bestmove capture and in-check position scores were not zeroed during minimization, for compatibility with skipping SEE >= 0 positions and future research. Training data can be found at: https://robotmoon.com/nnue-training-data This net was tested at epoch 679 of the 10th training stage: https://tests.stockfishchess.org/tests/view/65f32e460ec64f0526c48dbc Part 2: SPSA Training, Viren6 The net was then SPSA tuned. This consisted of the output weights (32 * 8) and biases (8) as well as the L3 biases (32 * 8) and L2 biases (16 * 8), totalling 648 params in total. The SPSA tune can be found here: https://tests.stockfishchess.org/tests/view/65fc33ba0ec64f0526c512e3 With the help of Disservin , the initial weights were extracted with: https://github.com/Viren6/Stockfish/tree/new228 The net was saved with the tuned weights using: https://github.com/Viren6/Stockfish/tree/new241 Earlier nets of the SPSA failed STC compared to the base 3072 net of part 1: https://tests.stockfishchess.org/tests/view/65ff356e0ec64f0526c53c98 Therefore it is suspected that the SPSA at VVLTC has added extra scaling on top of the scaling of increasing the L1 size. Passed VVLTC 1: https://tests.stockfishchess.org/tests/view/6604a9020ec64f0526c583da LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 53042 W: 13554 L: 13256 D: 26232 Elo +1.95 Ptnml(0-2): 12, 5147, 15903, 5449, 10 Passed VVLTC 2: https://tests.stockfishchess.org/tests/view/660ad1b60ec64f0526c5dd23 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 17506 W: 4574 L: 4315 D: 8617 Elo +5.14 Ptnml(0-2): 1, 1567, 5362, 1818, 5 STC Elo estimate: https://tests.stockfishchess.org/tests/view/660b834d01aaec5069f87cb0 Elo: -7.66 ± 3.8 (95%) LOS: 0.0% Total: 9618 W: 2440 L: 2652 D: 4526 Elo -7.66 Ptnml(0-2): 80, 1281, 2261, 1145, 42 nElo: -13.94 ± 6.9 (95%) PairsRatio: 0.87 closes https://tests.stockfishchess.org/tests/view/660b834d01aaec5069f87cb0 bench 1823302 Co-Authored-By: Linmiao Xu <> 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 Mar 30 12:38:02 2024 +0100 Timestamp: 1711798682 Avoid a note related to an ABI change current master triggers a gcc note: parameter passing for argument of type 'std::pair<double, double>' when C++17 is enabled changed to match C++14 in GCC 10.1 while this is inconsequential, and just informative https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111516 we can easily avoid it. closes https://github.com/official-stockfish/Stockfish/pull/5145 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: Fri Mar 29 13:13:07 2024 +0100 Timestamp: 1711714387 Improve prerelease creation workflow In the last couple of months we sometimes saw duplicated prereleases uploaded to GitHub, possibly due to some racy behavior when concurrent jobs create a prerelease. This now creates an empty prerelease at the beginning of the CI and the binaries are later just attached to this one. closes https://github.com/official-stockfish/Stockfish/pull/5144 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: Fri Mar 29 13:12:20 2024 +0100 Timestamp: 1711714340 Fix usage of abs vs std::abs close https://github.com/official-stockfish/Stockfish/pull/5143 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: Shawn Xu
Date: Fri Mar 29 10:18:40 2024 +0100 Timestamp: 1711703920 Simplify NMP Condition Remove eval >= ss->staticEval condition for Null Move Pruning. Passed non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 44000 W: 11420 L: 11202 D: 21378 Elo +1.72 Ptnml(0-2): 174, 5243, 10978, 5401, 204 https://tests.stockfishchess.org/tests/live_elo/6603ee490ec64f0526c57984 Passed non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 82956 W: 20978 L: 20818 D: 41160 Elo +0.67 Ptnml(0-2): 54, 9353, 22499, 9523, 49 https://tests.stockfishchess.org/tests/live_elo/660464b50ec64f0526c5804d closes https://github.com/official-stockfish/Stockfish/pull/5142 Bench 1759189 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 Mar 29 10:15:17 2024 +0100 Timestamp: 1711703717 Adjust best value after a pruned quiet move Logic somewhat similar to how we adjust best value after pruned captures in qsearch, but in search this patch does it after pruned quiet moves and also to not full scale of futility value but to smth in between best value and futility value. Passed STC: https://tests.stockfishchess.org/tests/view/6601cf900ec64f0526c55c30 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 59936 W: 15722 L: 15369 D: 28845 Elo +2.05 Ptnml(0-2): 182, 7097, 15112, 7340, 237 Passed LTC: https://tests.stockfishchess.org/tests/view/66029b2d0ec64f0526c566f1 LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 118362 W: 29953 L: 29460 D: 58949 Elo +1.45 Ptnml(0-2): 68, 13159, 32249, 13622, 83 closes https://github.com/official-stockfish/Stockfish/pull/5141 bench 1772608 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: Fri Mar 29 10:09:42 2024 +0100 Timestamp: 1711703382 Vary time use with eval Adjust time use depending on the current eval. Passed STC : LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 101696 W: 26651 L: 26238 D: 48807 Elo +1.41 Ptnml(0-2): 400, 11602, 26459, 11959, 428 https://tests.stockfishchess.org/tests/live_elo/660187a50ec64f0526c557f6 Passed LTC : LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 60648 W: 15550 L: 15187 D: 29911 Elo +2.08 Ptnml(0-2): 40, 6356, 17171, 6715, 42 https://tests.stockfishchess.org/tests/live_elo/660298ed0ec64f0526c566d0 Values were found using two tunes with the final values taken from the ltc tune after 62k games : stc - https://tests.stockfishchess.org/tests/view/65fb526b0ec64f0526c50694 ltc - https://tests.stockfishchess.org/tests/view/65fd36e60ec64f0526c5214b Ideas for future work; * tune these values with the other TM adjustments * try narrower bands * calculate adjustment for exact eval by interpolation closes https://github.com/official-stockfish/Stockfish/pull/5138 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: Tue Mar 26 18:17:00 2024 +0100 Timestamp: 1711473420 Remove material imbalance from nnue eval Passed non-reg STC: https://tests.stockfishchess.org/tests/view/65fdf11f0ec64f0526c52b57 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 76480 W: 19893 L: 19712 D: 36875 Elo +0.82 Ptnml(0-2): 339, 9107, 19157, 9308, 329 Passed non-reg LTC: https://tests.stockfishchess.org/tests/view/65fee22e0ec64f0526c53885 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 150948 W: 38078 L: 37988 D: 74882 Elo +0.21 Ptnml(0-2): 111, 16997, 41148, 17127, 91 closes https://github.com/official-stockfish/Stockfish/pull/5135 Bench: 2103324 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 26 18:17:00 2024 +0100 Timestamp: 1711473420 Tweak the stats bonus and malus For depth 1 we don't have a negative score anymore. Passed STC: https://tests.stockfishchess.org/tests/view/65fb055c0ec64f0526c5024f LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 117120 W: 30468 L: 30023 D: 56629 Elo +1.32 Ptnml(0-2): 526, 13759, 29539, 14216, 520 Passed LTC: https://tests.stockfishchess.org/tests/view/65fdca4b0ec64f0526c5293f LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 54816 W: 13955 L: 13595 D: 27266 Elo +2.28 Ptnml(0-2): 30, 6046, 14897, 6404, 31 closes https://github.com/official-stockfish/Stockfish/pull/5134 Bench: 1876428 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 26 18:17:00 2024 +0100 Timestamp: 1711473420 Add functionality to export small net Usage ``` export_net <filenameBigNet> <filenameSmallNet> ``` closes https://github.com/official-stockfish/Stockfish/pull/5133 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: Tue Mar 26 18:06:49 2024 +0100 Timestamp: 1711472809 Update nnue_feature_transformer.h Unroll update_accumulator_refresh to process two active indices simultaneously. The compiler might not unroll effectively because the number of active indices isn't known at compile time. STC https://tests.stockfishchess.org/tests/view/65faa8850ec64f0526c4fca9 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 130464 W: 33882 L: 33431 D: 63151 Elo +1.20 Ptnml(0-2): 539, 14591, 34501, 15082, 519 closes https://github.com/official-stockfish/Stockfish/pull/5125 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: Fri Mar 22 16:44:06 2024 +0100 Timestamp: 1711122246 VVLTC search tune This set of parameters was derived from 3 tuning attempts: https://tests.stockfishchess.org/tests/view/65d19ab61d8e83c78bfd8436 (80+0.8 x8, ~40k games) Then tuned with one of linrock's early L1-3072 nets: https://tests.stockfishchess.org/tests/view/65def7b04b19edc854ebdec8 (VVLTC, ~36k games) Starting from the result of this tuning, the parameters were then tuned with the current master net: https://tests.stockfishchess.org/tests/view/65f11c420ec64f0526c46fc4 (VVLTC, ~45k games) Additionally, at the start of the third tuning phase, 2 parameters were manually changed: Notably, the triple extension margin was decreased from 78 to 22. This idea was given by Vizvezdenec: https://tests.stockfishchess.org/tests/view/65f0a2360ec64f0526c46752. The PvNode extension margin was also adjusted from 50 to 40. This tune also differs from previous tuning attempts by tuning the evaluation thresholds for smallnet and psqt-only. The former was increased through the tuning, and this is hypothesized to scale better at VVLTC, although there is not much evidence of it. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/65f6761d0ec64f0526c4be88 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 44688 W: 11421 L: 11140 D: 22127 Elo +2.18 Ptnml(0-2): 1, 4170, 13722, 4449, 2 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/65fa31a30ec64f0526c4f611 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 27450 W: 7057 L: 6778 D: 13615 Elo +3.53 Ptnml(0-2): 4, 2545, 8346, 2828, 2 STC Elo estimate: https://tests.stockfishchess.org/tests/view/65fd3e540ec64f0526c521ae Elo: -7.84 ± 1.8 (95%) LOS: 0.0% Total: 40000 W: 9899 L: 10802 D: 19299 Elo -7.84 Ptnml(0-2): 203, 5221, 10025, 4378, 173 nElo: -14.91 ± 3.4 (95%) PairsRatio: 0.84 closes https://github.com/official-stockfish/Stockfish/pull/5130 Bench: 1876107 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 Mar 20 16:36:18 2024 +0100 Timestamp: 1710948978 Add cmath header to movepick.h 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: Wed Mar 20 16:29:35 2024 +0100 Timestamp: 1710948575 Remove reduction increase on repetition Passed non-reg STC: https://tests.stockfishchess.org/tests/view/65f89ae30ec64f0526c4e0ff LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 173568 W: 45005 L: 44936 D: 83627 Elo +0.14 Ptnml(0-2): 684, 19878, 45628, 19873, 721 Passed non-reg LTC: https://tests.stockfishchess.org/tests/view/65fa0f370ec64f0526c4f42d LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 21138 W: 5432 L: 5216 D: 10490 Elo +3.55 Ptnml(0-2): 13, 2107, 6112, 2325, 12 closes https://github.com/official-stockfish/Stockfish/pull/5123 Bench: 2109005 see source |