| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Sun Apr 28 21:35:48 2024 +0200 Timestamp: 1714332948 Combine remove and add in update_accumulator_refresh_cache() Combine remove and add in update_accumulator_refresh_cache(). Move remove before add to match other parts of the code. STC: https://tests.stockfishchess.org/tests/view/662d96dc6115ff6764c7f4ca LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 364032 W: 94421 L: 93624 D: 175987 Elo +0.76 Ptnml(0-2): 1261, 41983, 94811, 42620, 1341 closes https://github.com/official-stockfish/Stockfish/pull/5194 Bench: 1836777 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Sun Apr 28 21:30:19 2024 +0200 Timestamp: 1714332619 Cache small net w/ psqtOnly support Caching the small net in the same way as the big net allows them to share the same code path and completely removes update_accumulator_refresh(). STC: https://tests.stockfishchess.org/tests/view/662bfb5ed46f72253dcfed85 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 151712 W: 39252 L: 39158 D: 73302 Elo +0.22 Ptnml(0-2): 565, 17474, 39683, 17570, 564 closes https://github.com/official-stockfish/Stockfish/pull/5194 Bench: 1836777 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 Apr 28 21:27:28 2024 +0200 Timestamp: 1714332448 Output some basic info about the used networks Adds size in memory as well as layer sizes as in info string NNUE evaluation using nn-ae6a388e4a1a.nnue (132MiB, (22528, 3072, 15, 32, 1)) info string NNUE evaluation using nn-baff1ede1f90.nnue (6MiB, (22528, 128, 15, 32, 1)) For example, the size in MiB is useful to keep the fishtest memory sizes up-to-date, the L1-L3 sizes give a useful hint about the architecture used. closes https://github.com/official-stockfish/Stockfish/pull/5193 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 Apr 28 21:26:36 2024 +0200 Timestamp: 1714332396 Fix missing initialization of AccumulatorCaches in Eval::trace Add a constructor to `AccumulatorCaches` instead of just calling `clear(networks)` to prevent similar issues from appearing in the future. fixes https://github.com/official-stockfish/Stockfish/issues/5190 closes https://github.com/official-stockfish/Stockfish/pull/5191 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 Apr 28 21:26:25 2024 +0200 Timestamp: 1714332385 Use less time on recaptures Credit for the idea goes to peregrine on discord. Passed STC 10+0.1: https://tests.stockfishchess.org/tests/view/662652623fe04ce4cefc48cf LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 75712 W: 19793 L: 19423 D: 36496 Elo +1.70 Ptnml(0-2): 258, 8487, 20023, 8803, 285 Passed LTC 60+0.6: https://tests.stockfishchess.org/tests/view/6627495e3fe04ce4cefc59b6 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 49788 W: 12743 L: 12404 D: 24641 Elo +2.37 Ptnml(0-2): 29, 5141, 14215, 5480, 29 The code was updated slightly and tested for non-regression against the original code at STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 41952 W: 10912 L: 10698 D: 20342 Elo +1.77 Ptnml(0-2): 133, 4825, 10835, 5061, 122 https://tests.stockfishchess.org/tests/view/662d84f56115ff6764c7e438 closes https://github.com/official-stockfish/Stockfish/pull/5189 Bench: 1836777 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: Wed Apr 24 18:38:20 2024 +0200 Timestamp: 1713976700 Implement accumulator refresh table For each thread persist an accumulator cache for the network, where each cache contains multiple entries for each of the possible king squares. When the accumulator needs to be refreshed, the cached entry is used to more efficiently update the accumulator, instead of rebuilding it from scratch. This idea, was first described by Luecx (author of Koivisto) and is commonly referred to as "Finny Tables". When the accumulator needs to be refreshed, instead of filling it with biases and adding every piece from scratch, we... 1. Take the `AccumulatorRefreshEntry` associated with the new king bucket 2. Calculate the features to activate and deactivate (from differences between bitboards in the entry and bitboards of the actual position) 3. Apply the updates on the refresh entry 4. Copy the content of the refresh entry accumulator to the accumulator we were refreshing 5. Copy the bitboards from the position to the refresh entry, to match the newly updated accumulator Results at STC: https://tests.stockfishchess.org/tests/view/662301573fe04ce4cefc1386 (first version) https://tests.stockfishchess.org/tests/view/6627fa063fe04ce4cefc6560 (final) Non-Regression between first and final: https://tests.stockfishchess.org/tests/view/662801e33fe04ce4cefc660a STC SMP: https://tests.stockfishchess.org/tests/view/662808133fe04ce4cefc667c closes https://github.com/official-stockfish/Stockfish/pull/5183 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: Wed Apr 24 18:24:01 2024 +0200 Timestamp: 1713975841 Tune Search Parameters Parameters Tune, adding also another tunable parameter (npmDiv) to be variable for different nets (bignet, smallnet, psqtOnly smallnet). P.s: The changed values are only the parameters where there is agreement among the different time controls, so in other words, the tunings are telling us that changing these specific values to this specific direction is good in all time controls, so there shouldn't be a high risk of regressing at longer time controls. Passed STC: LLR: 2.97 (-2.94,2.94) <0.00,2.00> Total: 39552 W: 10329 L: 9999 D: 19224 Elo +2.90 Ptnml(0-2): 156, 4592, 9989, 4844, 195 https://tests.stockfishchess.org/tests/view/661be9a0bd68065432a088c0 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 56394 W: 14439 L: 14078 D: 27877 Elo +2.22 Ptnml(0-2): 30, 6152, 15480, 6497, 38 https://tests.stockfishchess.org/tests/view/661c746296961e72eb565406 closes https://github.com/official-stockfish/Stockfish/pull/5187 Bench: 1836777 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 Apr 24 18:20:55 2024 +0200 Timestamp: 1713975655 Restore NPS output for Perft Previously it was possible to also get the node counter after running a bench with perft, i.e. `./stockfish bench 1 1 5 current perft`, caused by a small regression from the uci refactoring. ``` Nodes searched: 4865609 =========================== Total time (ms) : 18 Nodes searched : 4865609 Nodes/second : 270311611 ```` closes https://github.com/official-stockfish/Stockfish/pull/5188 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: cj5716
Date: Sun Apr 21 14:50:04 2024 +0200 Timestamp: 1713703804 Tweak TT aging and replacement strategies We change the definition of "age" from "age of this position" to "age of this TT entry". In this way, despite being on the same position, when we save into TT, we always prefer the new entry as compared to the old one. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 152256 W: 39597 L: 39110 D: 73549 Elo +1.11 Ptnml(0-2): 556, 17562, 39398, 18063, 549 https://tests.stockfishchess.org/tests/view/6620faee3fe04ce4cefbf215 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 51564 W: 13242 L: 12895 D: 25427 Elo +2.34 Ptnml(0-2): 24, 5464, 14463, 5803, 28 https://tests.stockfishchess.org/tests/view/66231ab53fe04ce4cefc153e closes #5184 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: Disservin
Date: Sun Apr 21 14:49:11 2024 +0200 Timestamp: 1713703751 Move ALSR change to CI Workflow file It makes more sense to not (potentially) change the developers alsr entropy setting to make the test run through. This should be an active choice even if the test then might fail locally for them. closes https://github.com/official-stockfish/Stockfish/pull/5182 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 Apr 21 14:46:01 2024 +0200 Timestamp: 1713703561 Improve CI the recent refactoring has shown some limitations of our testing, hence we add a couple of more tests including: * expected mate score * expected mated score * expected in TB win score * expected in TB loss score * expected info line output * expected info line output (wdl) closes https://github.com/official-stockfish/Stockfish/pull/5181 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Robert Nurnberg @ elitebook
Date: Sun Apr 21 14:40:02 2024 +0200 Timestamp: 1713703202 update the WDL model The patch only changes the displayed cp and wdl values. closes https://github.com/official-stockfish/Stockfish/pull/5178 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Gahtan Nahdi
Date: Sun Apr 21 14:38:16 2024 +0200 Timestamp: 1713703096 fix clang compiler warning for avx512 build Initialize variable in constexpr function to get rid of clang compiler warning for avx512 build. closes https://github.com/official-stockfish/Stockfish/pull/5176 Non-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 Apr 21 14:35:54 2024 +0200 Timestamp: 1713702954 Trivial cleanup Make naming and declaration of futilityValue in search consistent between different places. closes https://github.com/official-stockfish/Stockfish/pull/5165 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 Apr 21 14:35:01 2024 +0200 Timestamp: 1713702901 Refactor elapsed time checks in search Small improvement of the elapsed time usage in search, makes the code easier to read overall. Also Search::Worker::iterative_deepening() now only checks the elapsed time once, instead of 3 times in a row. Non Regression STC: https://tests.stockfishchess.org/tests/view/6617005d5a4693796d965c3c LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 61024 W: 16002 L: 15806 D: 29216 Elo +1.12 Ptnml(0-2): 243, 6874, 16102, 7030, 263 closes https://github.com/official-stockfish/Stockfish/pull/5163 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 Apr 21 14:32:26 2024 +0200 Timestamp: 1713702746 Update outdated comments closes https://github.com/official-stockfish/Stockfish/pull/5158 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Disservin
Date: Sat 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 |