| !! latest version !! 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: Joost VandeVondele
Date: Thu Jan 1 16:17:38 2026 +0100 Timestamp: 1767280658 Update of the year Happy New Year! closes https://github.com/official-stockfish/Stockfish/pull/6514 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: mstembera
Date: Thu Jan 1 16:13:44 2026 +0100 Timestamp: 1767280424 Minor cleanup in full_threats.cpp closes https://github.com/official-stockfish/Stockfish/pull/6509 No functional change 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: FauziAkram
Date: Thu Jan 1 16:12:35 2026 +0100 Timestamp: 1767280355 Replacing nested loops with a single range-based for loop closes https://github.com/official-stockfish/Stockfish/pull/6503 No functional change 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: anematode
Date: Thu Jan 1 16:08:03 2026 +0100 Timestamp: 1767280083 simplify find_nnz a bit This code path is never taken for vector sizes >= 512, so we can simplify it. closes https://github.com/official-stockfish/Stockfish/pull/6501 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: ppigazzini
Date: Thu Jan 1 16:06:25 2026 +0100 Timestamp: 1767279985 build: rename WINE_PATH to RUN_PREFIX for wrapper execution WINE_PATH started as a Wine-specific knob, but it’s now used more generally as a command prefix to run the built engine under wrappers like Intel SDE, qemu-user, etc. - Add RUN_PREFIX as the supported “run wrapper/prefix” variable in Makefile - Set WINE_PATH as a deprecated alias - Update CI and scripts to use RUN_PREFIX closes https://github.com/official-stockfish/Stockfish/pull/6500 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: anematode
Date: Thu Jan 1 16:04:43 2026 +0100 Timestamp: 1767279883 port get_changed_pieces to ARM NEON passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 71968 W: 18833 L: 18489 D: 34646 Elo +1.66 Ptnml(0-2): 192, 7310, 20643, 7640, 199 https://tests.stockfishchess.org/tests/view/69509e5c572093c1986d7a0a closes https://github.com/official-stockfish/Stockfish/pull/6512 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: Thu Jan 1 15:53:04 2026 +0100 Timestamp: 1767279184 Adjust main history with every new root position this patch dampens down main history to 3/4 of it value for all possible moves at the start of ID loop, making it partially refresh with every new root position. Passed STC: https://tests.stockfishchess.org/tests/view/694e33ff572093c1986d7234 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 115520 W: 30164 L: 29735 D: 55621 Elo +1.29 Ptnml(0-2): 395, 13192, 30192, 13551, 430 Passed LTC: https://tests.stockfishchess.org/tests/view/6950cbe6572093c1986d816c LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 63672 W: 16480 L: 16114 D: 31078 Elo +2.00 Ptnml(0-2): 46, 6524, 18329, 6892, 45 closes https://github.com/official-stockfish/Stockfish/pull/6504 bench 2710946 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: Steinar H. Gunderson
Date: Thu Jan 1 15:52:01 2026 +0100 Timestamp: 1767279121 Fix feature check Use _POSIX_C_SOURCE to check for PTHREAD_MUTEX_ROBUST support. The latter is a enum, not a defined variable. closes https://github.com/official-stockfish/Stockfish/pull/6510 No functional change 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: Joost VandeVondele
Date: Thu Jan 1 15:51:09 2026 +0100 Timestamp: 1767279069 Fix incorrect initialization Fixes https://github.com/official-stockfish/Stockfish/issues/6505 Missing initialization seemingly resulting in side effects, as discussed in the issue. Credit to Sopel for spotting the bug. PR used as a testcase for CoPilot, doing the right thing https://github.com/official-stockfish/Stockfish/pull/6478#discussion_r2655467218 closes https://github.com/official-stockfish/Stockfish/pull/6511 No functional change see source |
| 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: Timothy Herchen
Date: Sun Dec 28 14:59:26 2025 +0100 Timestamp: 1766930366 Remove -Wstack-usage on (apple) clang Clang pretends to be GCC, but is enraged by `-Wstack-usage`: closes https://github.com/official-stockfish/Stockfish/pull/6499 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: anematode
Date: Sun Dec 28 14:59:09 2025 +0100 Timestamp: 1766930349 Shared pawn history [Passed STC SMP](https://tests.stockfishchess.org/tests/view/694e506c572093c1986d7276): ``` LLR: 2.97 (-2.94,2.94) <0.00,2.00> Total: 14992 W: 3924 L: 3653 D: 7415 Elo +6.28 Ptnml(0-2): 20, 1547, 4090, 1820, 19 ``` [Passed LTC SMP](https://tests.stockfishchess.org/tests/live_elo/694ead61572093c1986d7365): ``` LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 41146 W: 10654 L: 10342 D: 20150 Elo +2.63 Ptnml(0-2): 17, 3999, 12225, 4319, 13 ``` [Passed a sanity check STC SMP post-refactoring](https://tests.stockfishchess.org/tests/view/69503997572093c1986d763a): ``` LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 46728 W: 12178 L: 11863 D: 22687 Elo +2.34 Ptnml(0-2): 82, 5093, 12685, 5436, 68 ``` (The large gain of the first STC was probably a fluke, and this result is more reasonable!) After shared correction history, Viz suggested we try sharing other histories, especially `pawnHistory`. As far as we're aware, sharing history besides correction history (like Caissa does) is novel. The implementation follows the same pattern as shared correction history – the size of the history table is scaled with `next_power_of_two(threadsInNumaNode)` and the entry is prefetched in `do_move`. A bit of refactoring was done to accommodate this new history. Note that we prefetch `&history->pawn_entry(*this)[pc][to]` rather than `&history->pawn_entry(*this)` because unlike the other entries, each entry contains multiple cache lines. closes https://github.com/official-stockfish/Stockfish/pull/6498 Bench: 2503391 Co-authored-by: Michael Chaly <> 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: Stefan Geschwentner
Date: Sun Dec 28 14:55:55 2025 +0100 Timestamp: 1766930155 For expected ALL nodes scale up reduction with depth dependent factor. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 141120 W: 36860 L: 36390 D: 67870 Elo +1.16 Ptnml(0-2): 470, 16441, 36314, 16819, 516 https://tests.stockfishchess.org/tests/view/694978e93c8768ca45072763 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 66576 W: 17078 L: 16700 D: 32798 Elo +1.97 Ptnml(0-2): 45, 7093, 18628, 7483, 39 https://tests.stockfishchess.org/tests/view/694bb608572093c1986d6ba6 closes https://github.com/official-stockfish/Stockfish/pull/6496 Bench: 2503391 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: KazApps
Date: Sun Dec 28 14:55:47 2025 +0100 Timestamp: 1766930147 Fix nonPawnKey Fix incorrect nonPawnKey update Passed non-reg SMP STC: ``` LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 139424 W: 35792 L: 35690 D: 67942 Elo +0.25 Ptnml(0-2): 197, 15783, 37665, 15855, 212 ``` https://tests.stockfishchess.org/tests/view/694b7b7e572093c1986d6b0d Passed non-reg SMP LTC: ``` LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 88880 W: 22863 L: 22718 D: 43299 Elo +0.57 Ptnml(0-2): 16, 8947, 26401, 9028, 48 ``` https://tests.stockfishchess.org/tests/view/694d2ceb572093c1986d6fc8 fixes https://github.com/official-stockfish/Stockfish/issues/6492 closes https://github.com/official-stockfish/Stockfish/pull/6494 Bench: 2475788 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: Sun Dec 28 14:53:12 2025 +0100 Timestamp: 1766929992 Simplify doDeeperSearch Passed simplification STC LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 92096 W: 23888 L: 23728 D: 44480 Elo +0.60 Ptnml(0-2): 336, 10796, 23608, 10988, 320 https://tests.stockfishchess.org/tests/view/694b6b9d572093c1986d6ae0 Passed simplification LTC LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 50064 W: 12789 L: 12598 D: 24677 Elo +1.33 Ptnml(0-2): 24, 5350, 14103, 5521, 34 https://tests.stockfishchess.org/tests/view/694d49aa572093c1986d7021 closes https://github.com/official-stockfish/Stockfish/pull/6493 Bench: 2494221 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: Joost VandeVondele
Date: Sun Dec 28 14:51:56 2025 +0100 Timestamp: 1766929916 Update Top CPU Contributors update to current closes https://github.com/official-stockfish/Stockfish/pull/6491 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: Sun Dec 28 14:50:36 2025 +0100 Timestamp: 1766929836 Removing redundant parentheses closes https://github.com/official-stockfish/Stockfish/pull/6490 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: Sun Dec 28 14:49:19 2025 +0100 Timestamp: 1766929759 Refine reduction logic based on next-ply cutoff count Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 38208 W: 10076 L: 9754 D: 18378 Elo +2.93 Ptnml(0-2): 139, 4390, 9742, 4676, 157 https://tests.stockfishchess.org/tests/view/6945bb6446f342e1ec211d93 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 64086 W: 16529 L: 16157 D: 31400 Elo +2.02 Ptnml(0-2): 34, 6808, 17990, 7174, 37 https://tests.stockfishchess.org/tests/view/69479d303c8768ca45072446 closes https://github.com/official-stockfish/Stockfish/pull/6489 Bench: 2442415 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: Taras Vuk
Date: Tue Dec 23 21:42:45 2025 +0100 Timestamp: 1766522565 Incorporate statscore into history bonus Passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 80128 W: 20879 L: 20498 D: 38751 Elo +1.65 Ptnml(0-2): 274, 9318, 20496, 9705, 271 https://tests.stockfishchess.org/tests/view/6945d11f3c8768ca45072218 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 134298 W: 34497 L: 33983 D: 65818 Elo +1.33 Ptnml(0-2): 81, 14334, 37812, 14834, 88 https://tests.stockfishchess.org/tests/view/6947bf033c8768ca45072491 closes https://github.com/official-stockfish/Stockfish/pull/6488 Bench: 2325401 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 Dec 23 21:42:45 2025 +0100 Timestamp: 1766522565 Init threat offsets at compile time Init threat offsets at compile time. Avoid another global init function call. Passed STC Non-Regression: https://tests.stockfishchess.org/tests/view/694971a83c8768ca4507275c LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 43296 W: 11284 L: 11077 D: 20935 Elo +1.66 Ptnml(0-2): 152, 4611, 11924, 4800, 161 closes https://github.com/official-stockfish/Stockfish/pull/6487 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: Tue Dec 23 21:42:45 2025 +0100 Timestamp: 1766522565 Simplify doDeeperSearch formula Passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 211776 W: 54939 L: 54911 D: 101926 Elo +0.05 Ptnml(0-2): 714, 24971, 54484, 25011, 708 https://tests.stockfishchess.org/tests/view/6938971875b70713ef796b70 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 216774 W: 55346 L: 55326 D: 106102 Elo +0.03 Ptnml(0-2): 105, 23599, 60980, 23577, 126 https://tests.stockfishchess.org/tests/view/693fc91f46f342e1ec20f9f6 closes https://github.com/official-stockfish/Stockfish/pull/6486 Bench: 3267755 see source |
| 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: Michael Chaly
Date: Tue Dec 23 21:42:45 2025 +0100 Timestamp: 1766522565 Less penalty for quiet late moves that didn't beat the best move. This moves since they are late in move ordering probably already have pretty bad stats anyway. Passed STC: https://tests.stockfishchess.org/tests/view/6943bcd546f342e1ec210e25 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 96704 W: 25206 L: 24798 D: 46700 Elo +1.47 Ptnml(0-2): 357, 11244, 24767, 11602, 382 Passed LTC: https://tests.stockfishchess.org/tests/view/6946a8723c8768ca450722f0 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 89814 W: 23193 L: 22770 D: 43851 Elo +1.64 Ptnml(0-2): 53, 9532, 25321, 9941, 60 bench 2717363 closes https://github.com/official-stockfish/Stockfish/pull/6485 Bench: 2791988 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: anematode
Date: Tue Dec 23 21:42:29 2025 +0100 Timestamp: 1766522549 Share correction history between threads We did quite a few tests because this is a pretty involved change with unknown scaling behavior, but results are decent. [STC 10+0.1 1th, non-regression](https://tests.stockfishchess.org/tests/live_elo/6941ce3b46f342e1ec210180) ``` LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 83200 W: 21615 L: 21452 D: 40133 Elo +0.68 Ptnml(0-2): 247, 9064, 22844, 9169, 276 ``` [STC 5+0.05 8th](https://tests.stockfishchess.org/tests/live_elo/693dc38346f342e1ec20f555) ``` LLR: 3.48 (-2.94,2.94) <0.00,2.00> Total: 58536 W: 15067 L: 14688 D: 28781 Elo +2.25 Ptnml(0-2): 87, 6474, 15781, 6825, 101 ``` [LTC 20+0.2 8th](https://tests.stockfishchess.org/tests/live_elo/693f2afb46f342e1ec20f847) ``` LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 27716 W: 7211 L: 6925 D: 13580 Elo +3.59 Ptnml(0-2): 8, 2674, 8207, 2962, 7 ``` [LTC 10+0.1 64th](https://tests.stockfishchess.org/tests/live_elo/694003aa46f342e1ec20fac4): ``` LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 16918 W: 4439 L: 4182 D: 8297 Elo +5.28 Ptnml(0-2): 3, 1493, 5213, 1744, 6 ``` [NUMA test, 5+0.05 256th](https://tests.stockfishchess.org/tests/view/6941ee4e46f342e1ec210203) ``` LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 7124 W: 1910 L: 1678 D: 3536 Elo +11.32 Ptnml(0-2): 0, 560, 2211, 790, 1 ``` [LTC 60+0.6 64th](https://tests.stockfishchess.org/tests/live_elo/6940a85346f342e1ec20fcde): ``` LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 15504 W: 4045 L: 3826 D: 7633 Elo +4.91 Ptnml(0-2): 0, 1002, 5530, 1219, 1 ``` Bonus (courtesy of Viz): The 1 double kill in this last test was master blundering a cool mate in 3: https://lichess.org/jyNZuRl4 Basically the idea here is to share correction history between threads. That way, T1 can use the correction values produced by T2, which already searched positions with that pawn structure etc., so that T1 can search more efficiently. The table size per thread is about the same, so we shouldn't get a large increase in hash collisions; in fact, I'd expect a lower collision rate overall. Although I came up with and implemented the idea independently, [Caissa](https://github.com/Witek902/Caissa) was the first engine to implement corrhist sharing (and corrhist in the first place) – this idea is not completely novel. The table size is rounded to a power of two. In particular, it's `65536 * nextPowerOfTwo(threadCount)`. That way, the indexing operation becomes an AND of the key bits with a mask, rather than something more expensive (e.g., a `mul_hi64`-style approach or a modulo). The updates are racy, like the TT, but because `entry` is hoisted into a register, there's no risk of writing back a value that's out of the designated range `[-D, D]`. Various attempts at rewriting using atomics led to substantial slowdowns, so we begrudgingly ignored the functions in thread sanitizer, but at some point we'd like to make this better. We allocate one shared correction history per NUMA node, because the penalty associated with crossing nodes is substantial – I get a 40% hit with NPS=4 and 256 threads, which is intolerable. With separate tables per NUMA node I get a 6% penalty for nodes per second, which isn't ideal but apparently compensated for. closes https://github.com/official-stockfish/Stockfish/pull/6478 Bench: 2690604 Co-authored-by: Disservin <> see source |
| Windows x64 for Haswell CPUs 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 Dec 23 21:41:34 2025 +0100 Timestamp: 1766522494 Remove low ply history for check evasions scoring Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 81888 W: 21336 L: 21166 D: 39386 Elo +0.72 Ptnml(0-2): 284, 9438, 21342, 9584, 296 https://tests.stockfishchess.org/tests/view/692ada47b23dfeae38cffce5 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 107328 W: 27534 L: 27404 D: 52390 Elo +0.42 Ptnml(0-2): 55, 11390, 30659, 11490, 70 https://tests.stockfishchess.org/tests/view/692d7a01b23dfeae38d011ab closes https://github.com/official-stockfish/Stockfish/pull/6467 Bench: 3006182 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: AliceRoselia
Date: Sun Dec 21 15:43:32 2025 +0100 Timestamp: 1766328212 Simplify futility pruning Passed non regression STC: https://tests.stockfishchess.org/tests/view/693e642c46f342e1ec20f68d LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 107968 W: 28080 L: 27937 D: 51951 Elo +0.46 Ptnml(0-2): 381, 12708, 27626, 12925, 344 Passed non regression LTC: https://tests.stockfishchess.org/tests/view/693ff10c46f342e1ec20fa6a LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 334266 W: 85271 L: 85370 D: 163625 Elo -0.10 Ptnml(0-2): 179, 36395, 94086, 36292, 181 closes https://github.com/official-stockfish/Stockfish/pull/6484 Bench: 2987379 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: Sun Dec 21 15:43:32 2025 +0100 Timestamp: 1766328212 Remove Secondary TT Aging Passed VVLTC w/ STC Bounds: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 107006 W: 27676 L: 27326 D: 52004 Elo +1.14 Ptnml(0-2): 21, 9505, 34097, 9863, 17 https://tests.stockfishchess.org/tests/view/6939ac5b75b70713ef796f11 Passed VVLTC w/ LTC Bounds: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 263190 W: 67547 L: 66837 D: 128806 Elo +0.94 Ptnml(0-2): 32, 23939, 82942, 24651, 31 https://tests.stockfishchess.org/tests/view/692165823b03dd3a060e666d closes https://github.com/official-stockfish/Stockfish/pull/6480 Bench: 2800411 see source |