| 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 May 30 14:21:28 2024 +0200 Timestamp: 1717071688 Remove Queen threatenedByMinor Remove Queen threatenedByMinor from movepick Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 54432 W: 14053 L: 13855 D: 26524 Elo +1.26 Ptnml(0-2): 124, 6347, 14090, 6517, 138 https://tests.stockfishchess.org/tests/view/66578d036b0e318cefa8d43d Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 198168 W: 49979 L: 49940 D: 98249 Elo +0.07 Ptnml(0-2): 84, 21824, 55236, 21849, 91 https://tests.stockfishchess.org/tests/view/66579cf86b0e318cefa8d5b1 closes https://github.com/official-stockfish/Stockfish/pull/5306 bench: 1342438 see source |
| Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Linmiao Xu
Date: Thu May 30 14:18:39 2024 +0200 Timestamp: 1717071519 Simplify blending eval with nnue complexity Passed non-regression STC: https://tests.stockfishchess.org/tests/view/66567377a86388d5e27dd89c LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 144000 W: 37443 L: 37338 D: 69219 Elo +0.25 Ptnml(0-2): 587, 17260, 36208, 17351, 594 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/66567f29a86388d5e27dd924 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 112326 W: 28550 L: 28421 D: 55355 Elo +0.40 Ptnml(0-2): 66, 12732, 30434, 12869, 62 closes https://github.com/official-stockfish/Stockfish/pull/5305 bench 1554486 see source |
| 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: Thu May 30 14:16:17 2024 +0200 Timestamp: 1717071377 Simplify Away Quadruple Extension Passed non-regression VVLTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 90792 W: 23155 L: 23018 D: 44619 Elo +0.52 Ptnml(0-2): 6, 8406, 28432, 8549, 3 https://tests.stockfishchess.org/tests/view/664ffa4ca86388d5e27d8e7a Passed non-regression VLTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 288136 W: 72608 L: 72659 D: 142869 Elo -0.06 Ptnml(0-2): 38, 30258, 83525, 30211, 36 https://tests.stockfishchess.org/tests/view/66551609a86388d5e27db9ae closes https://github.com/official-stockfish/Stockfish/pull/5293 bench 1501735 see source |
| Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: xoto10
Date: Wed May 29 19:04:57 2024 +0200 Timestamp: 1717002297 Add compensation factor to adjust extra time according to time control As stockfish nets and search evolve, the existing time control appears to give too little time at STC, roughly correct at LTC, and too little at VLTC+. This change adds an adjustment to the optExtra calculation. This adjustment is easy to retune and refine, so it should be easier to keep up-to-date than the more complex calculations used for optConstant and optScale. Passed STC 10+0.1: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 169568 W: 43803 L: 43295 D: 82470 Elo +1.04 Ptnml(0-2): 485, 19679, 44055, 19973, 592 https://tests.stockfishchess.org/tests/view/66531865a86388d5e27da9fa Yellow LTC 60+0.6: LLR: -2.94 (-2.94,2.94) <0.50,2.50> Total: 209970 W: 53087 L: 52914 D: 103969 Elo +0.29 Ptnml(0-2): 91, 19652, 65314, 19849, 79 https://tests.stockfishchess.org/tests/view/6653e38ba86388d5e27daaa0 Passed VLTC 180+1.8 : LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 85618 W: 21735 L: 21342 D: 42541 Elo +1.59 Ptnml(0-2): 15, 8267, 25848, 8668, 11 https://tests.stockfishchess.org/tests/view/6655131da86388d5e27db95f closes https://github.com/official-stockfish/Stockfish/pull/5297 Bench: 1212167 see source |
| 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: Wed May 29 19:01:50 2024 +0200 Timestamp: 1717002110 Simplify Fail Low Bonus Formula Tested against PR #5299 Passed Non-regression STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 76352 W: 19797 L: 19619 D: 36936 Elo +0.81 Ptnml(0-2): 236, 9017, 19509, 9161, 253 https://tests.stockfishchess.org/tests/view/66564f60a86388d5e27dd307 Passed Non-regression LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 114624 W: 28946 L: 28821 D: 56857 Elo +0.38 Ptnml(0-2): 59, 12675, 31714, 12810, 54 https://tests.stockfishchess.org/tests/view/6656543da86388d5e27dd329 closes https://github.com/official-stockfish/Stockfish/pull/5301 Bench: 1212167 see source |
| Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: mstembera
Date: Wed May 29 19:00:37 2024 +0200 Timestamp: 1717002037 Fix MSVC NUMA compile issues closes https://github.com/official-stockfish/Stockfish/pull/5298 No functional change see source |
| 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: Wed May 29 18:58:38 2024 +0200 Timestamp: 1717001918 Tune Fail Low Bonus Fractional bonus idea is from @Ergodice on [discord](https://discord.com/channels/435943710472011776/735707599353151579/1244039134499180614). Values are tuned for 149k games at LTC. SPSA tune: https://tests.stockfishchess.org/tests/view/6652d5d5a86388d5e27da9d6 Failed STC: LLR: -2.95 (-2.94,2.94) <0.00,2.00> Total: 67424 W: 17364 L: 17528 D: 32532 Elo -0.85 Ptnml(0-2): 238, 8043, 17299, 7909, 223 https://tests.stockfishchess.org/tests/view/66551e1ba86388d5e27db9f9 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 146910 W: 37141 L: 36695 D: 73074 Elo +1.05 Ptnml(0-2): 84, 16201, 40441, 16643, 86 https://tests.stockfishchess.org/tests/view/66559949a86388d5e27dcc5d Passed VLTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 27248 W: 6924 L: 6633 D: 13691 Elo +3.71 Ptnml(0-2): 5, 2744, 7835, 3035, 5 https://tests.stockfishchess.org/tests/view/66563f4da86388d5e27dd27a closes https://github.com/official-stockfish/Stockfish/pull/5299 Bench: 1390709 see source |
| Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Stéphane Nicolet
Date: Wed May 29 18:57:32 2024 +0200 Timestamp: 1717001852 Merge pawn count terms using their average This simplification patch merges the pawn count terms in the eval formula with the material term, updating the offset constant for the nnue part of the formula from 34000 to 34300 because the average pawn count in middlegame positions evaluated during search is around 8. STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 138240 W: 35834 L: 35723 D: 66683 Elo +0.28 Ptnml(0-2): 527, 16587, 34817, 16626, 563 https://tests.stockfishchess.org/tests/view/6653f474a86388d5e27daaac LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 454272 W: 114787 L: 115012 D: 224473 Elo -0.17 Ptnml(0-2): 246, 51168, 124553, 50903, 266 https://tests.stockfishchess.org/tests/view/6654f256a86388d5e27db131 closes https://github.com/official-stockfish/Stockfish/pull/5303 Bench: 1279635 see source |
| 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 May 29 18:55:30 2024 +0200 Timestamp: 1717001730 Simplifying malus for putting piece en prise formula Patch author: @ehsanrashid Passed STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 116192 W: 30229 L: 30094 D: 55869 Elo +0.40 Ptnml(0-2): 451, 13880, 29351, 13911, 503 https://tests.stockfishchess.org/tests/view/66510a40a86388d5e27da936 Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 441312 W: 111009 L: 111220 D: 219083 Elo -0.17 Ptnml(0-2): 217, 49390, 121659, 49167, 223 https://tests.stockfishchess.org/tests/view/66530696a86388d5e27da9e3 closes https://github.com/official-stockfish/Stockfish/pull/5304 Bench: 1987574 see source |
| Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Tomasz Sobczyk
Date: Tue May 28 18:34:15 2024 +0200 Timestamp: 1716914055 Improve performance on NUMA systems Allow for NUMA memory replication for NNUE weights. Bind threads to ensure execution on a specific NUMA node. This patch introduces NUMA memory replication, currently only utilized for the NNUE weights. Along with it comes all machinery required to identify NUMA nodes and bind threads to specific processors/nodes. It also comes with small changes to Thread and ThreadPool to allow easier execution of custom functions on the designated thread. Old thread binding (WinProcGroup) machinery is removed because it's incompatible with this patch. Small changes to unrelated parts of the code were made to ensure correctness, like some classes being made unmovable, raw pointers replaced with unique_ptr. etc. Windows 7 and Windows 10 is partially supported. Windows 11 is fully supported. Linux is fully supported, with explicit exclusion of Android. No additional dependencies. ----------------- A new UCI option `NumaPolicy` is introduced. It can take the following values: ``` system - gathers NUMA node information from the system (lscpu or windows api), for each threads binds it to a single NUMA node none - assumes there is 1 NUMA node, never binds threads auto - this is the default value, depends on the number of set threads and NUMA nodes, will only enable binding on multinode systems and when the number of threads reaches a threshold (dependent on node size and count) [[custom]] - // ':'-separated numa nodes // ','-separated cpu indices // supports "first-last" range syntax for cpu indices, for example '0-15,32-47:16-31,48-63' ``` Setting `NumaPolicy` forces recreation of the threads in the ThreadPool, which in turn forces the recreation of the TT. The threads are distributed among NUMA nodes in a round-robin fashion based on fill percentage (i.e. it will strive to fill all NUMA nodes evenly). Threads are bound to NUMA nodes, not specific processors, because that's our only requirement and the OS can schedule them better. Special care is made that maximum memory usage on systems that do not require memory replication stays as previously, that is, unnecessary copies are avoided. On linux the process' processor affinity is respected. This means that if you for example use taskset to restrict Stockfish to a single NUMA node then the `system` and `auto` settings will only see a single NUMA node (more precisely, the processors included in the current affinity mask) and act accordingly. ----------------- We can't ensure that a memory allocation takes place on a given NUMA node without using libnuma on linux, or using appropriate custom allocators on windows (https://learn.microsoft.com/en-us/windows/win32/memory/allocating-memory-from-a-numa-node), so to avoid complications the current implementation relies on first-touch policy. Due to this we also rely on the memory allocator to give us a new chunk of untouched memory from the system. This appears to work reliably on linux, but results may vary. MacOS is not supported, because AFAIK it's not affected, and implementation would be problematic anyway. Windows is supported since Windows 7 (https://learn.microsoft.com/en-us/windows/win32/api/processtopologyapi/nf-processtopologyapi-setthreadgroupaffinity). Until Windows 11/Server 2022 NUMA nodes are split such that they cannot span processor groups. This is because before Windows 11/Server 2022 it's not possible to set thread affinity spanning processor groups. The splitting is done manually in some cases (required after Windows 10 Build 20348). Since Windows 11/Server 2022 we can set affinites spanning processor group so this splitting is not done, so the behaviour is pretty much like on linux. Linux is supported, **without** libnuma requirement. `lscpu` is expected. ----------------- Passed 60+1 @ 256t 16000MB hash: https://tests.stockfishchess.org/tests/view/6654e443a86388d5e27db0d8 ``` LLR: 2.95 (-2.94,2.94) <0.00,10.00> Total: 278 W: 110 L: 29 D: 139 Elo +104.25 Ptnml(0-2): 0, 1, 56, 82, 0 ``` Passed SMP STC: https://tests.stockfishchess.org/tests/view/6654fc74a86388d5e27db1cd ``` LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 67152 W: 17354 L: 17177 D: 32621 Elo +0.92 Ptnml(0-2): 64, 7428, 18408, 7619, 57 ``` Passed STC: https://tests.stockfishchess.org/tests/view/6654fb27a86388d5e27db15c ``` LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 131648 W: 34155 L: 34045 D: 63448 Elo +0.29 Ptnml(0-2): 426, 13878, 37096, 14008, 416 ``` fixes #5253 closes https://github.com/official-stockfish/Stockfish/pull/5285 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: Tue May 28 18:31:06 2024 +0200 Timestamp: 1716913866 apply const to prefetch parameter closes https://github.com/official-stockfish/Stockfish/pull/5296 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 May 28 18:30:24 2024 +0200 Timestamp: 1716913824 Tweak return value in futility pruning Tweak the return value formula in futility pruning. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 60544 W: 15791 L: 15440 D: 29313 Elo +2.01 Ptnml(0-2): 193, 7024, 15520, 7309, 226 https://tests.stockfishchess.org/tests/view/6654ef22a86388d5e27db122 Passed LTC: LLR: 2.96 (-2.94,2.94) <0.50,2.50> Total: 126426 W: 32317 L: 31812 D: 62297 Elo +1.39 Ptnml(0-2): 55, 13871, 34869, 14350, 68 https://tests.stockfishchess.org/tests/view/66550644a86388d5e27db649 closes https://github.com/official-stockfish/Stockfish/pull/5295 bench: 1856147 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: Tue May 28 18:26:42 2024 +0200 Timestamp: 1716913602 Simplify Away TT Cutoff Return Value Adjustments Passed Non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 198432 W: 51161 L: 51119 D: 96152 Elo +0.07 Ptnml(0-2): 772, 23670, 50273, 23746, 755 https://tests.stockfishchess.org/tests/view/66517b9ea86388d5e27da966 Passed Non-regression LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 234150 W: 59200 L: 59197 D: 115753 Elo +0.00 Ptnml(0-2): 126, 26200, 64404, 26235, 110 https://tests.stockfishchess.org/tests/view/6653a84da86388d5e27daa63 closes https://github.com/official-stockfish/Stockfish/pull/5292 bench 1555200 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: Sun May 26 20:32:41 2024 +0200 Timestamp: 1716748361 Remove rootDelta branch This makes rootDelta logic easier to understand, recalculating the value where it belongs so removes an unnecessary branch. Passed non-regression STC: https://tests.stockfishchess.org/tests/view/664fc147a86388d5e27d8d8e LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 206016 W: 53120 L: 53089 D: 99807 Elo +0.05 Ptnml(0-2): 591, 20928, 59888, 21061, 540 closes https://github.com/official-stockfish/Stockfish/pull/5289 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: Linmiao Xu
Date: Sun May 26 20:32:30 2024 +0200 Timestamp: 1716748350 Lower smallnet threshold with tuned eval params The smallnet threshold is now below the training data range of the current smallnet (simple eval diff > 1k, nn-baff1edelf90.nnue) when no pawns are on the board. Params found with spsa at 93k / 120k games at 60+06: https://tests.stockfishchess.org/tests/view/664fa166a86388d5e27d7d6b Tuned on top of: https://github.com/official-stockfish/Stockfish/pull/5287 Passed STC: https://tests.stockfishchess.org/tests/view/664fc8b7a86388d5e27d8dac LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 64672 W: 16731 L: 16371 D: 31570 Elo +1.93 Ptnml(0-2): 239, 7463, 16517, 7933, 184 Passed LTC: https://tests.stockfishchess.org/tests/view/664fd5f9a86388d5e27d8dfe LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 210648 W: 53489 L: 52813 D: 104346 Elo +1.11 Ptnml(0-2): 102, 23129, 58164, 23849, 80 closes https://github.com/official-stockfish/Stockfish/pull/5288 Bench: 1717838 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: Stéphane Nicolet
Date: Sun May 26 20:24:05 2024 +0200 Timestamp: 1716747845 Simplify material weights in evaluation This patch uses the same material weights for the nnue amplification term and the optimism term in evaluate(). STC: LLR: 2.99 (-2.94,2.94) <-1.75,0.25> Total: 83360 W: 21489 L: 21313 D: 40558 Elo +0.73 Ptnml(0-2): 303, 9934, 21056, 10058, 329 https://tests.stockfishchess.org/tests/view/664eee69928b1fb18de500d9 LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 192648 W: 48675 L: 48630 D: 95343 Elo +0.08 Ptnml(0-2): 82, 21484, 53161, 21501, 96 https://tests.stockfishchess.org/tests/view/664fa17aa86388d5e27d7d6e closes https://github.com/official-stockfish/Stockfish/pull/5287 Bench: 1495602 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 May 23 21:37:46 2024 +0200 Timestamp: 1716493066 VVLTC search tune Parameters were tuned in 2 stages: 1. 127k games at VVLTC: https://tests.stockfishchess.org/tests/view/6649f8dfb8fa20e74c39f52a. 2. 106k games at VVLTC: https://tests.stockfishchess.org/tests/view/664bfb77830eb9f886615a9d. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/664e8dd9928b1fb18de4e410 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 20466 W: 5340 L: 5093 D: 10033 Elo +4.19 Ptnml(0-2): 0, 1796, 6397, 2037, 3 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/664eb4aa928b1fb18de4e47d LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 15854 W: 4186 L: 3934 D: 7734 Elo +5.52 Ptnml(0-2): 1, 1367, 4938, 1621, 0 closes https://github.com/official-stockfish/Stockfish/pull/5286 Bench: 1558110 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: Linmiao Xu
Date: Thu May 23 21:37:46 2024 +0200 Timestamp: 1716493066 Remove material imbalance param when adjusting optimism Passed non-regression STC: https://tests.stockfishchess.org/tests/view/664d033d830eb9f886616aff LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 102144 W: 26283 L: 26135 D: 49726 Elo +0.50 Ptnml(0-2): 292, 12201, 25991, 12243, 345 Passed non-regression LTC: https://tests.stockfishchess.org/tests/view/664d5c00830eb9f886616cb3 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 250032 W: 63022 L: 63036 D: 123974 Elo -0.02 Ptnml(0-2): 103, 27941, 68970, 27871, 131 closes https://github.com/official-stockfish/Stockfish/pull/5284 Bench: 1330940 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 May 23 21:37:46 2024 +0200 Timestamp: 1716493066 Revert "Reduce When TTValue is Above Alpha" The patch regressed significantly at longer time controls. In particular, the `depth--` behavior was predicted to scale badly based on data from other variations of the patch. Passed VVLTC 1st sprt: https://tests.stockfishchess.org/tests/view/664d45cf830eb9f886616c7d LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 51292 W: 13242 L: 12954 D: 25096 Elo +1.95 Ptnml(0-2): 5, 4724, 15896, 5020, 1 Passed VVLTC 2nd sprt: https://tests.stockfishchess.org/tests/view/664e641a928b1fb18de4e385 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 41884 W: 10933 L: 10634 D: 20317 Elo +2.48 Ptnml(0-2): 1, 3759, 13125, 4054, 3 closes https://github.com/official-stockfish/Stockfish/pull/5283 Bench: 1503815 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: Thu May 23 21:37:46 2024 +0200 Timestamp: 1716493066 Optimise pairwise multiplication This speedup was first inspired by a comment by @AndyGrant on my recent PR "If mullo_epi16 would preserve the signedness, then this could be used to remove 50% of the max operations during the halfkp-pairwise mat-mul relu deal." That got me thinking, because although mullo_epi16 did not preserve the signedness, mulhi_epi16 did, and so we could shift left and then use mulhi_epi16, instead of shifting right after the mullo. However, due to some issues with shifting into the sign bit, the FT weights and biases had to be multiplied by 2 for the optimisation to work. Speedup on "Arch=x86-64-bmi2 COMP=clang", courtesy of @Torom Result of 50 runs base (...es/stockfish) = 962946 +/- 1202 test (...ise-max-less) = 979696 +/- 1084 diff = +16750 +/- 1794 speedup = +0.0174 P(speedup > 0) = 1.0000 CPU: 4 x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz Hyperthreading: on Also a speedup on "COMP=gcc", courtesy of Torom once again Result of 50 runs base (...tockfish_gcc) = 966033 +/- 1574 test (...max-less_gcc) = 983319 +/- 1513 diff = +17286 +/- 2515 speedup = +0.0179 P(speedup > 0) = 1.0000 CPU: 4 x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz Hyperthreading: on Passed STC: LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 67712 W: 17715 L: 17358 D: 32639 Elo +1.83 Ptnml(0-2): 225, 7472, 18140, 7759, 260 https://tests.stockfishchess.org/tests/view/664c1d75830eb9f886616906 closes https://github.com/official-stockfish/Stockfish/pull/5282 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: Thu May 23 21:30:33 2024 +0200 Timestamp: 1716492633 Simplify Away History Updates in Multicut Passed Non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 44896 W: 11600 L: 11388 D: 21908 Elo +1.64 Ptnml(0-2): 140, 5230, 11532, 5370, 176 https://tests.stockfishchess.org/tests/view/664cee31830eb9f886616a80 Passed Non-regression LTC: LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 56832 W: 14421 L: 14234 D: 28177 Elo +1.14 Ptnml(0-2): 37, 6251, 15643, 6458, 27 https://tests.stockfishchess.org/tests/view/664cfd4e830eb9f886616aa6 closes https://github.com/official-stockfish/Stockfish/pull/5281 Bench: 1119412 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: Linmiao Xu
Date: Thu May 23 21:30:24 2024 +0200 Timestamp: 1716492624 Comment about re-evaluating positions While the smallNet bool is no longer used as of now, setting it to false upon re-evaluation represents the correct eval state. closes https://github.com/official-stockfish/Stockfish/pull/5279 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: Thu May 23 21:29:36 2024 +0200 Timestamp: 1716492576 Addition of new scaling comments This patch is intended to prevent patches like 9b90cd8 and the subsequent reversion e3c9ed7 from happening again. Scaling behaviour of the reduction adjustments in the non-linear scaling section have been proven to >8 sigma: STC: https://tests.stockfishchess.org/tests/view/6647b19f6dcff0d1d6b05d52 Elo: 4.28 ± 0.8 (95%) LOS: 100.0% Total: 200000 W: 52555 L: 50094 D: 97351 Elo +4.28 Ptnml(0-2): 573, 22628, 51248, 24867, 684 nElo: 8.35 ± 1.5 (95%) PairsRatio: 1.10 VLTC: https://tests.stockfishchess.org/tests/view/6647b1b06dcff0d1d6b05d54 Elo: -1.48 ± 1.0 (95%) LOS: 0.2% Total: 100000 W: 25009 L: 25436 D: 49555 Elo -1.48 Ptnml(0-2): 11, 10716, 28971, 10293, 9 nElo: -3.23 ± 2.2 (95%) PairsRatio: 0.96 The else if condition is moved to the non scaling section based on: https://tests.stockfishchess.org/tests/view/664567a193ce6da3e93b3232 (It has no proven scaling) General comment improvements and removal of a redundant margin condition have also been included. closes https://github.com/official-stockfish/Stockfish/pull/5266 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: Dubslow
Date: Thu May 23 21:29:11 2024 +0200 Timestamp: 1716492551 Improve comments about DEPTH constants Also "fix" movepicker to allow depths between CHECKS and NO_CHECKS, which makes them easier to tweak (not that they get tweaked hardly ever) (This was more beneficial when there was a third stage to DEPTH_QS, but it's still an improvement now) closes https://github.com/official-stockfish/Stockfish/pull/5205 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: Linmiao Xu
Date: Tue May 21 22:06:17 2024 +0200 Timestamp: 1716321977 Lower smallnet threshold with updated eval divisors Params found after 30k spsa games at 60+0.6, with initial values from 64k spsa games at 45+0.45 First spsa with 64k / 120k games at 45+0.45: https://tests.stockfishchess.org/tests/view/664a561b5fc7b70b8817c663 https://tests.stockfishchess.org/tests/view/664ae88e830eb9f8866146f9 Second spsa with 30k / 120k games at 60+0.6: https://tests.stockfishchess.org/tests/view/664be227830eb9f886615a36 Values found at 10k games at 60+0.6 also passed STC and LTC: https://tests.stockfishchess.org/tests/view/664bf4bd830eb9f886615a72 https://tests.stockfishchess.org/tests/view/664c0905830eb9f886615abf Passed STC: https://tests.stockfishchess.org/tests/view/664c139e830eb9f886615af2 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 69408 W: 18216 L: 17842 D: 33350 Elo +1.87 Ptnml(0-2): 257, 8275, 17401, 8379, 392 Passed LTC: https://tests.stockfishchess.org/tests/view/664cdaf7830eb9f886616a24 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 35466 W: 9075 L: 8758 D: 17633 Elo +3.11 Ptnml(0-2): 27, 3783, 9794, 4104, 25 closes https://github.com/official-stockfish/Stockfish/pull/5280 bench 1301287 see source |