| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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 Apr 26 22:40:41 2025 +0200 Timestamp: 1745700041 Allow some nodes to spawn even deeper lmr searches This includes nodes that were PvNode on a previous ply and only for non cutNodes and movecounts < 8. Passed STC: https://tests.stockfishchess.org/tests/view/680cdf2e3629b02d74b15576 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 123552 W: 31979 L: 31539 D: 60034 Elo +1.24 Ptnml(0-2): 322, 14449, 31803, 14871, 331 Passed LTC: https://tests.stockfishchess.org/tests/view/680cf09a3629b02d74b15599 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 114306 W: 29310 L: 28837 D: 56159 Elo +1.44 Ptnml(0-2): 51, 12247, 32090, 12708, 57 closes https://github.com/official-stockfish/Stockfish/pull/6022 bench: 1585741 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 Apr 26 22:38:14 2025 +0200 Timestamp: 1745699894 Simplify and cleanup futility pruning for child nodes This patch removes (eval - beta) / 8 addition and adjusts constants accordingly, also moves every calculation into futility_margin function. Passed STC: https://tests.stockfishchess.org/tests/view/6806d00f878abf56f9a0d524 LLR: 2.99 (-2.94,2.94) <-1.75,0.25> Total: 483456 W: 124592 L: 124860 D: 234004 Elo -0.19 Ptnml(0-2): 1419, 57640, 123927, 57274, 1468 Passed LTC: https://tests.stockfishchess.org/tests/view/680cceb33629b02d74b1554c LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 263868 W: 67076 L: 67104 D: 129688 Elo -0.04 Ptnml(0-2): 155, 28893, 73846, 28905, 135 closes https://github.com/official-stockfish/Stockfish/pull/6021 bench: 1618439 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Myself
Date: Sat Apr 26 22:33:49 2025 +0200 Timestamp: 1745699629 Check only if good see. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 106400 W: 27863 L: 27444 D: 51093 Elo +1.37 Ptnml(0-2): 320, 12431, 27275, 12858, 316 https://tests.stockfishchess.org/tests/view/6806239498cd372e3aea5949 Passed LTC: LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 420534 W: 107594 L: 106494 D: 206446 Elo +0.91 Ptnml(0-2): 197, 45541, 117722, 46579, 228 https://tests.stockfishchess.org/tests/view/6806b4b3878abf56f9a0d4fc closes https://github.com/official-stockfish/Stockfish/pull/6020 bench: 1675758 see source |
| 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: Sat Apr 26 22:26:39 2025 +0200 Timestamp: 1745699199 Remove unneeded return statement closes https://github.com/official-stockfish/Stockfish/pull/6013 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: breatn
Date: Sat Apr 26 22:23:26 2025 +0200 Timestamp: 1745699006 Adaptive beta cut passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 197088 W: 51084 L: 50533 D: 95471 Elo +0.97 Ptnml(0-2): 547, 23201, 50577, 23592, 627 https://tests.stockfishchess.org/tests/view/680604d798cd372e3aea58fe passed LTC LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 127950 W: 32719 L: 32214 D: 63017 Elo +1.37 Ptnml(0-2): 69, 13825, 35673, 14348, 60 https://tests.stockfishchess.org/tests/view/6805eae498cd372e3aea588a closes https://github.com/official-stockfish/Stockfish/pull/6012 bench 1579003 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: Sat Apr 26 22:15:08 2025 +0200 Timestamp: 1745698508 Remove manual stack alignment workaround for GCC < 9.3 consequently using these old compilers will now error out. closes https://github.com/official-stockfish/Stockfish/pull/6008 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: Nonlinear2
Date: Sat Apr 26 22:11:40 2025 +0200 Timestamp: 1745698300 Increase full depth search reduction when cutNode In addition to the core patch, improve the use of `isTTMove`: - this name was used to mean both `bestMove == ttData.move` and `move == ttData.move`, so i replaced the argument `isTTMove` of `update_all_stats` with `TTMove` directly. - `ttData.move == move` was still used in some places instead of `ss->isTTMove`. I replaced these to be more consistent. Passed STC: https://tests.stockfishchess.org/tests/view/68057b8f98cd372e3aea3472 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 38400 W: 10048 L: 9734 D: 18618 Elo +2.84 Ptnml(0-2): 102, 4360, 9956, 4686, 96 Passed LTC: https://tests.stockfishchess.org/tests/view/68057f7c98cd372e3aea3842 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 312666 W: 79494 L: 78616 D: 154556 Elo +0.98 Ptnml(0-2): 144, 33809, 87563, 34659, 158 closes https://github.com/official-stockfish/Stockfish/pull/6007 Bench: 1623376 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: Daniel Monroe
Date: Sat Apr 26 22:06:18 2025 +0200 Timestamp: 1745697978 Tweak futility formula Passed STC LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 248448 W: 64344 L: 63718 D: 120386 Elo +0.88 Ptnml(0-2): 750, 29172, 63783, 29740, 779 https://tests.stockfishchess.org/tests/view/68056f5598cd372e3aea2901 Passed LTC LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 118824 W: 30358 L: 29874 D: 58592 Elo +1.42 Ptnml(0-2): 59, 12797, 33228, 13257, 71 https://tests.stockfishchess.org/tests/view/6805675698cd372e3aea20d0 closes https://github.com/official-stockfish/Stockfish/pull/6004 bench 1839796 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: Sat Apr 26 22:01:34 2025 +0200 Timestamp: 1745697694 Prefer discovered and double checks in capture ordering. Increase weight for captured piece value if also a discovered or double check. Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 142144 W: 36632 L: 36164 D: 69348 Elo +1.14 Ptnml(0-2): 429, 16470, 36788, 16974, 411 https://tests.stockfishchess.org/tests/view/68052d7498cd372e3ae9faaa Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 668328 W: 170837 L: 169238 D: 328253 Elo +0.83 Ptnml(0-2): 308, 72010, 187990, 73487, 369 https://tests.stockfishchess.org/tests/view/68053c9398cd372e3aea043b closes https://github.com/official-stockfish/Stockfish/pull/6003 Bench: 1636625 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: Sat Apr 26 21:58:46 2025 +0200 Timestamp: 1745697526 Re-adding the 5th continuation history the two simplifications (#5992 and #5978) are strongly correlated. Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 98016 W: 25415 L: 25008 D: 47593 Elo +1.44 Ptnml(0-2): 291, 11509, 25005, 11908, 295 https://tests.stockfishchess.org/tests/view/6802774fcd501869c6698168 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 588588 W: 150073 L: 148633 D: 289882 Elo +0.85 Ptnml(0-2): 281, 63615, 165078, 65023, 297 https://tests.stockfishchess.org/tests/view/6804cbdacd501869c66987dc closes https://github.com/official-stockfish/Stockfish/pull/6002 Bench: 1783315 see source |
| 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 Apr 26 21:52:36 2025 +0200 Timestamp: 1745697156 Do second step of shallower search Specifically if lmr depth is not lower than new depth and value is really bad. Passed STC: https://tests.stockfishchess.org/tests/view/6805444898cd372e3aea0494 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 77664 W: 20136 L: 19762 D: 37766 Elo +1.67 Ptnml(0-2): 214, 9006, 20039, 9338, 235 Passed LTC: https://tests.stockfishchess.org/tests/view/680549b298cd372e3aea05ac LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 115458 W: 29447 L: 28971 D: 57040 Elo +1.43 Ptnml(0-2): 62, 12357, 32421, 12821, 68 closes https://github.com/official-stockfish/Stockfish/pull/6001 bench: 1515501 see source |
| Windows x64 for Haswell CPUs 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: Sat Apr 26 21:49:38 2025 +0200 Timestamp: 1745696978 simplify risk tolerance Passed Non-regression STC: LLR: 2.98 (-2.94,2.94) <-1.75,0.25> Total: 73408 W: 19028 L: 18844 D: 35536 Elo +0.87 Ptnml(0-2): 201, 8709, 18743, 8807, 244 https://tests.stockfishchess.org/tests/view/68051f3698cd372e3ae9f63a Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 91236 W: 23193 L: 23045 D: 44998 Elo +0.56 Ptnml(0-2): 34, 9908, 25599, 10030, 47 https://tests.stockfishchess.org/tests/view/6805239498cd372e3ae9fa41 closes https://github.com/official-stockfish/Stockfish/pull/6000 bench 1864632 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: Sat Apr 26 21:43:11 2025 +0200 Timestamp: 1745696591 Tweak TT Move Reduction by TT Move History Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 62496 W: 16197 L: 15844 D: 30455 Elo +1.96 Ptnml(0-2): 200, 7234, 16011, 7619, 184 https://tests.stockfishchess.org/tests/view/67f7fa9b31d7cf8afdc4609c Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 400470 W: 102068 L: 101012 D: 197390 Elo +0.92 Ptnml(0-2): 201, 43207, 112347, 44295, 185 https://tests.stockfishchess.org/tests/view/67f927b0cd501869c66975e0 Passed VVLTC Non-regression: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 125394 W: 32408 L: 32304 D: 60682 Elo +0.29 Ptnml(0-2): 3, 11702, 39188, 11796, 8 https://tests.stockfishchess.org/tests/view/6804c215cd501869c66986b9 closes https://github.com/official-stockfish/Stockfish/pull/5998 bench 1760988 see source |
| 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: Sat Apr 26 21:37:17 2025 +0200 Timestamp: 1745696237 remove StateInfo::next unused. closes https://github.com/official-stockfish/Stockfish/pull/5997 no functional change see source |
| 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 Apr 26 21:34:26 2025 +0200 Timestamp: 1745696066 Add x86-64-avxvnni in CI will result in the corresponding binaries being available for download closes https://github.com/official-stockfish/Stockfish/pull/5990 No functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers 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: Sat Apr 26 21:30:01 2025 +0200 Timestamp: 1745695801 Remove non-functional accumulator reset Passed Non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 219360 W: 56600 L: 56583 D: 106177 Elo +0.03 Ptnml(0-2): 582, 23419, 61620, 23518, 541 https://tests.stockfishchess.org/tests/view/67fad20dcd501869c669780f closes https://github.com/official-stockfish/Stockfish/pull/5986 no functional change see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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 Apr 26 21:25:18 2025 +0200 Timestamp: 1745695518 Use matching llvm-profdata when using multiple clang compilers in parallel, it is necessary to use a matching llvm-profdata, as the profile data format may change between versions. To use the proper llvm-profdata binary, the one in the same directory as the compiler is used. This allows for code like: ```bash echo "Compiling clang" for comp in clang++-11 clang++-12 clang++-13 clang++-14 clang++-15 clang++-16 clang++-17 clang++-18 clang++-19 clang++-20 do make -j profile-build CXX=$comp COMP=clang >& out.compile.$comp mv stockfish stockfish.$comp done ``` after installing the required versions with the automatic installation script (https://apt.llvm.org/) closes https://github.com/official-stockfish/Stockfish/pull/5958 No functional change see source |
| Windows x64 for modern computers Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Daniel Monroe
Date: Fri Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Skip 5th continuation history Passed simplification STC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 70208 W: 18098 L: 17914 D: 34196 Elo +0.91 Ptnml(0-2): 199, 8300, 17907, 8514, 184 https://tests.stockfishchess.org/tests/view/67ed889b31d7cf8afdc451cb Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 485004 W: 122703 L: 122956 D: 239345 Elo -0.18 Ptnml(0-2): 288, 53162, 135805, 53009, 238 https://tests.stockfishchess.org/tests/view/67ee810231d7cf8afdc452ea closes https://github.com/official-stockfish/Stockfish/pull/5992 Bench: 1715901 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 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: Fri Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Move node increment inside do_move function Move node increment inside do_move function so that we can centralize the increment into a single point. closes https://github.com/official-stockfish/Stockfish/pull/5989 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 Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Simplify TT Move History Part 1 passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 195552 W: 50394 L: 50349 D: 94809 Elo +0.08 Ptnml(0-2): 581, 23222, 50122, 23273, 578 https://tests.stockfishchess.org/tests/view/67eb6ea831d7cf8afdc44c30 Part 2 passed Non-regression STC: LLR: 2.92 (-2.94,2.94) <-1.75,0.25> Total: 181664 W: 46786 L: 46727 D: 88151 Elo +0.11 Ptnml(0-2): 517, 21403, 46974, 21380, 558 https://tests.stockfishchess.org/tests/view/67eb6f3331d7cf8afdc44c33 Passed Non-regression LTC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 155454 W: 39496 L: 39412 D: 76546 Elo +0.19 Ptnml(0-2): 77, 16950, 43580, 17052, 68 https://tests.stockfishchess.org/tests/view/67eee76531d7cf8afdc45358 Passed Non-regression VLTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 118266 W: 30263 L: 30148 D: 57855 Elo +0.34 Ptnml(0-2): 11, 11844, 35309, 11957, 12 https://tests.stockfishchess.org/tests/view/67f2414a31d7cf8afdc45760 closes https://github.com/official-stockfish/Stockfish/pull/5987 Bench: 1792850 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: Fri Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Improve stalemate detection during search Currently SF’s quiescence search like most alpha-beta based engines doesn’t verify for stalemate because doing it each leaf position is to expensive and costs elo. However in certain positions this creates a blindspot for SF, not recognizing soon enough that the opponent can reach a stalemate by sacrifycing his last mobile heavy piece(s). This tactical motif & it’s measure are similar to zugzwang & verification search: the measure itself does not gain elo, but prevents SF from loosing/drawing games in an awkward way. The fix consists of 3 measures: 1. Make qsearch verify for stalemate on transitions to pure KP-material for the side to move with our last Rook/Queen just been captured. In fact this is the scenario where stalemate happens with highest frequency. The stalemate-verification itself is optimized by merely checking for pawn pushes & king mobility (captures were already tried by qssearch) 2. Another culprit for the issue figured out to be SEE based pruning for checks in step 14. Here often the move forcing the stalemate (or forcing the opponent to not retake) get pruned away and it need to much time to reach enough depth. To encounter this we verify following conditions: - a) side to move is happy with a draw (alpha < 0) - b) we are about to sacrify our last heavy & unique mobile piece in this position. - c) this piece doesn’t move away from our kingring giving the king a new square to move. When all 3 conditions meet we don’t prune the move, because there is a good chance that capturing the piece means stalemate. 3. Store terminal nodes (mates & stalemates) in TT with higher depth than searched depth. This prevents SF from: - reanalyzing the node (=trying to generate legal moves) in vain at each iterative deepening step. - overwriting an already correct draw-evaluation from a previous shallow normal search by a qsearch which doesn’t recognize stalemate and might store a verry erratic evaluation. This is due to the 4 constant in the TT-overwrite condition: d - DEPTH_ENTRY_OFFSET + 2 * pv > depth8 – 4 which allows qs to override entries made by normal searches with depth <=4. This 3hrd measure however is not essential for fixing the issue, but tests (one of vdv & one of mine) seem to suggest that this measure brings some small benefit. Another other position where SF benefits from this fix is for instance Position FEN 8/8/8/1B6/6p1/8/3K1Ppp/3N2kr w - - 0 1 bm f4 +M9 P.S.: Also this issue higly depends on the used net, how good the net is at evaluate such mobility restricted positions. SF16 was pretty good in solving 2rr4/5pBk/PqP3p1/1N3pPp/1PQ1bP1P/8/3R4/R4K2 b - - 0 40 bm Rxc6 (< 1 second) while SF16_1 with introduction of the dual net needs about 1,5 minutes and SF17.1 requires 3 minutes to find the drawing move Rxc6. P.S.2: Using more threads produces indeterminism & using high hash pressure makes SF reevaluate explored positions more often which makes it more likely to solve the position. To have stable meaningful results I tested therfore with one single thread and low hash pressure. Preliminary LTC test at 30k games https://tests.stockfishchess.org/tests/view/67ece7a931d7cf8afdc44e18 Elo: 0.04 ± 2.0 (95%) LOS: 51.7% Total: 24416 W: 6226 L: 6223 D: 11967 Elo +0.04 Ptnml(0-2): 12, 2497, 7185, 2504, 10 nElo: 0.09 ± 4.4 (95%) PairsRatio: 1.00 Passed LTC no-regression sprt https://tests.stockfishchess.org/tests/view/67ee8e4631d7cf8afdc452fb LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 401556 W: 101612 L: 101776 D: 198168 Elo -0.14 Ptnml(0-2): 152, 42241, 116170, 42049, 166 closes https://github.com/official-stockfish/Stockfish/pull/5983 fixes https://github.com/official-stockfish/Stockfish/issues/5899 Bench: 1721673 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 Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Simplify bonusScale calculation Allowing this specific term to potentially become negative for low depth values is ok, because the overall `bonusScale` is explicitly ensured to be non-negative a few lines later: bonusScale = std::max(bonusScale, 0); Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 164928 W: 42446 L: 42368 D: 80114 Elo +0.16 Ptnml(0-2): 497, 19551, 42306, 19597, 513 https://tests.stockfishchess.org/tests/view/67debf0b8888403457d8736c Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 234942 W: 59539 L: 59537 D: 115866 Elo +0.00 Ptnml(0-2): 113, 25639, 65964, 25643, 112 https://tests.stockfishchess.org/tests/view/67e2e1c48888403457d87768 closes https://github.com/official-stockfish/Stockfish/pull/5979 Bench: 1933843 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: Daniel Monroe
Date: Fri Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Don't use 5th continuation history in move ordering Passed simplification STC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 136960 W: 35374 L: 35262 D: 66324 Elo +0.28 Ptnml(0-2): 420, 16214, 35049, 16428, 369 https://tests.stockfishchess.org/tests/view/67e6d0ae6682f97da2178ee5 Passed simplification LTC LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 233016 W: 59063 L: 59059 D: 114894 Elo +0.01 Ptnml(0-2): 113, 25430, 65421, 25428, 116 https://tests.stockfishchess.org/tests/view/67e9f7fb31d7cf8afdc44ad4 closes https://github.com/official-stockfish/Stockfish/pull/5978 Bench: 1842721 see source |
| Windows x64 for Haswell CPUs Windows x64 for modern computers Windows x64 + SSSE3 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 Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Remove combineLast3 optimization Passed non-reg STC 1st: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 67328 W: 17296 L: 17118 D: 32914 Elo +0.92 Ptnml(0-2): 158, 7095, 19011, 7211, 189 https://tests.stockfishchess.org/tests/view/67e6c2796682f97da2178ebe Passed non-reg STC 2nd: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 92288 W: 23885 L: 23734 D: 44669 Elo +0.57 Ptnml(0-2): 213, 10039, 25518, 10132, 242 https://tests.stockfishchess.org/tests/view/67ed6a2d31d7cf8afdc45190 closes https://github.com/official-stockfish/Stockfish/pull/5975 Bench: 1875196 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: Fri Apr 18 14:32:26 2025 +0200 Timestamp: 1744979546 Fix fused() all controll paths should return a value. closes https://github.com/official-stockfish/Stockfish/pull/5973 No functional change see source |