| !! latest version !! Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64 | Author: Muzhen Gaming
Date: Sun May 5 15:11:53 2024 +0200 Timestamp: 1714914713 VVLTC search tune This patch is the result of two tuning stages: 1. ~32k games at 60+0.6 th8: https://tests.stockfishchess.org/tests/view/662d9dea6115ff6764c7f817 2. ~193k games at 80+0.8 th6, based on PR #5211: https://tests.stockfishchess.org/tests/view/663587e273559a8aa857ca00. Based on extensive VVLTC tuning and testing both before and after #5211, it is observed that introduction of new extensions positively affected the search tune results. Passed VVLTC 70+0.7 th7 1st sprt: https://tests.stockfishchess.org/tests/view/6636c6f04b68b70d85801409 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 18566 W: 4864 L: 4620 D: 9082 Elo +4.57 Ptnml(0-2): 0, 1608, 5827, 1844, 4 Passed VVLTC 70+0.7 th7 2nd sprt: https://tests.stockfishchess.org/tests/view/6636d4b84b68b70d85802ab7 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 43142 W: 11141 L: 10838 D: 21163 Elo +2.44 Ptnml(0-2): 4, 3915, 13427, 4224, 1 Passed VVLTC 70+0.7 3rd sprt: https://tests.stockfishchess.org/tests/view/66376b4f9819650825aa230b LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 40322 W: 10374 L: 10076 D: 19872 Elo +2.57 Ptnml(0-2): 1, 3660, 12544, 3952, 4 The first two sprts were run against passed #5211. The third sprt was run against latest master. closes https://github.com/official-stockfish/Stockfish/pull/5216 Bench: 2180675 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 May 5 15:11:37 2024 +0200 Timestamp: 1714914697 Simplify accumulator refreshes Passed Non-Regression STC: https://tests.stockfishchess.org/tests/view/6631f5d5d01fb9ac9bcdc7d0 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 57472 W: 14979 L: 14784 D: 27709 Elo +1.18 Ptnml(0-2): 185, 6486, 15192, 6695, 178 closes https://github.com/official-stockfish/Stockfish/pull/5207 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: Sun May 5 13:06:22 2024 +0200 Timestamp: 1714907182 Adjust history usage in moves loop pruning After experiments with conthist 5 addition failed really bad divions by 2 passed as a gainer. Passed STC: https://tests.stockfishchess.org/tests/view/6636d7114b68b70d858035ce LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 35936 W: 9287 L: 8976 D: 17673 Elo +3.01 Ptnml(0-2): 81, 4129, 9234, 4446, 78 Passed LTC: https://tests.stockfishchess.org/tests/view/6636ddb64b68b70d858040a8 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 82428 W: 21035 L: 20622 D: 40771 Elo +1.74 Ptnml(0-2): 29, 8985, 22775, 9394, 31 closes https://github.com/official-stockfish/Stockfish/pull/5217 Bench: 2309253 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 May 5 13:04:37 2024 +0200 Timestamp: 1714907077 Some history fixes and tidy-up This adds the functions `update_refutations` and `update_quiet_histories` to better distinguish the two. `update_quiet_stats` now just calls both of these functions. The functional side of this patch is two-fold: 1. Stop refutations being updated when we carry out multicut 2. Update pawn history every time we update other quiet histories Yellow STC: LLR: -2.95 (-2.94,2.94) <0.00,2.00> Total: 238976 W: 61506 L: 61415 D: 116055 Elo +0.13 Ptnml(0-2): 846, 28628, 60456, 28705, 853 https://tests.stockfishchess.org/tests/view/66321b5ed01fb9ac9bcdca83 However, it passed in <-1.75, 0.25> bounds: $ python3 sprt.py --wins 61506 --losses 61415 --draws 116055 --elo0 -1.75 --elo1 0.25 ELO: 0.132 +- 0.998 [-0.865, 1.13] LLR: 4.15 [-1.75, 0.25] (-2.94, 2.94) H1 Accepted Passed LTC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 399126 W: 100730 L: 100896 D: 197500 Elo -0.14 Ptnml(0-2): 116, 44328, 110843, 44158, 118 https://tests.stockfishchess.org/tests/view/66357b0473559a8aa857ba6f closes #5215 Bench 2370967 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 May 5 13:02:42 2024 +0200 Timestamp: 1714906962 Simplify shuffling and optimism divisors to constants Shuffling divisor and Optimism divisors passed STC & LTC separately: shuf STC: https://tests.stockfishchess.org/tests/view/66356316b4e9bdbc7228b995 shuf LTC: https://tests.stockfishchess.org/tests/view/6635815a73559a8aa857c1dc opt STC: https://tests.stockfishchess.org/tests/view/66356326b4e9bdbc7228b9a0 opt LTC: https://tests.stockfishchess.org/tests/view/663615c673559a8aa8589f8a And then passed LTC together: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 178278 W: 45039 L: 44979 D: 88260 Elo +0.12 Ptnml(0-2): 43, 19776, 49460, 19798, 62 https://tests.stockfishchess.org/tests/view/66363f19cdb7cf5da64e22a3 closes https://github.com/official-stockfish/Stockfish/pull/5212 Bench: 2198243 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: Sun May 5 12:53:58 2024 +0200 Timestamp: 1714906438 Introduce Quadruple Extensions This patch introduces quadruple extensions, with the new condition of not ttPv. It also generalises all margins, so that extensions can still occur if conditions are only partially fulfilled, but with a stricter margin. Failed STC: LLR: -2.94 (-2.94,2.94) <0.00,2.00> Total: 16096 W: 3984 L: 4228 D: 7884 Elo -5.27 Ptnml(0-2): 72, 2067, 4002, 1847, 60 https://tests.stockfishchess.org/tests/view/66316422d01fb9ac9bcdbdcd Passed VVLTC 1: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 96660 W: 24550 L: 24210 D: 47900 Elo +1.22 Ptnml(0-2): 5, 8776, 30426, 9120, 3 https://tests.stockfishchess.org/tests/view/66361f2c74fa3f41ef2ee091 Passed VVLTC 2: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 80546 W: 20495 L: 20120 D: 39931 Elo +1.62 Ptnml(0-2): 6, 7477, 24929, 7858, 3 https://tests.stockfishchess.org/tests/view/66350cf739ba8e443112b3fa closes https://github.com/official-stockfish/Stockfish/pull/5211 bench 2233743 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 May 5 12:42:30 2024 +0200 Timestamp: 1714905750 Add extra bonuses to some moves that forced a fail low The previous patch on this idea was giving bonuses to this moves if best value of search is far below current static evaluation. This patch does similar thing but adds extra bonus when best value of search is far below static evaluation before previous move. Passed STC: https://tests.stockfishchess.org/tests/view/66355fc819566d64b481d6a4 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 454144 W: 116575 L: 115656 D: 221913 Elo +0.70 Ptnml(0-2): 1060, 53410, 117215, 54325, 1062 Passed LTC: https://tests.stockfishchess.org/tests/view/6635c61a73559a8aa858012d LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 136578 W: 34858 L: 34335 D: 67385 Elo +1.33 closes https://github.com/official-stockfish/Stockfish/pull/5209 Bench: 1614825 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 May 5 12:36:20 2024 +0200 Timestamp: 1714905380 Remove PSQT-only mode Passed STC: LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 94208 W: 24270 L: 24112 D: 45826 Elo +0.58 Ptnml(0-2): 286, 11186, 24009, 11330, 293 https://tests.stockfishchess.org/tests/view/6635ddd773559a8aa8582826 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 114960 W: 29107 L: 28982 D: 56871 Elo +0.38 Ptnml(0-2): 37, 12683, 31924, 12790, 46 https://tests.stockfishchess.org/tests/view/663604a973559a8aa85881ed closes #5214 Bench 1653939 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 May 5 12:30:28 2024 +0200 Timestamp: 1714905028 Clear Workers after changing the network ensures internal state (e.g. accumulator cache) is consistent with network closes https://github.com/official-stockfish/Stockfish/pull/5204 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: Wed May 1 14:17:32 2024 +0200 Timestamp: 1714565852 Accumulator cache bugfix and cleanup STC: https://tests.stockfishchess.org/tests/view/663068913a05f1bf7a511dc2 LLR: 2.98 (-2.94,2.94) <-1.75,0.25> Total: 70304 W: 18211 L: 18026 D: 34067 Elo +0.91 Ptnml(0-2): 232, 7966, 18582, 8129, 243 1) Fixes a bug introduced in https://github.com/official-stockfish/Stockfish/pull/5194. Only one psqtOnly flag was used for two perspectives which was causing wrong entries to be cleared and marked. 2) The finny caches should be cleared like histories and not at the start of every search. closes https://github.com/official-stockfish/Stockfish/pull/5203 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: Wed May 1 14:10:57 2024 +0200 Timestamp: 1714565457 Optimise NNUE Accumulator updates Passed STC: https://tests.stockfishchess.org/tests/view/662e3c6a5e9274400985a741 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 86176 W: 22284 L: 21905 D: 41987 Elo +1.53 Ptnml(0-2): 254, 9572, 23051, 9963, 248 closes https://github.com/official-stockfish/Stockfish/pull/5202 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: Ciekce
Date: Wed May 1 14:10:57 2024 +0200 Timestamp: 1714565457 Avoid unnecessary creation of accumulator cache Saves a (currently) 800 KB allocation and deallocation when running `eval`, not particularly significant and zero impact on play but not necessary either. closes https://github.com/official-stockfish/Stockfish/pull/5201 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: Wed May 1 14:10:50 2024 +0200 Timestamp: 1714565450 Use capture history to better judge which sacrifices to explore This idea has been bouncing around a while. @Vizvezdenec tried it a couple years ago in Stockfish without results, but its recent arrival in Ethereal inspired him and thence me to try it afresh in Stockfish. (Also factor out the now-common code with futpruning for captures.) STC: https://tests.stockfishchess.org/tests/view/662355bc3fe04ce4cefc18ac LLR: 2.92 (-2.94,2.94) <0.00,2.00> Total: 45760 W: 11970 L: 11640 D: 22150 Elo +2.51 Ptnml(0-2): 124, 5371, 11625, 5571, 189 LTC: https://tests.stockfishchess.org/tests/view/662dda396115ff6764c817c9 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 243828 W: 62042 L: 61287 D: 120499 Elo +1.08 Ptnml(0-2): 211, 27202, 66329, 27965, 207 closes https://github.com/official-stockfish/Stockfish/pull/5200 Bench: 1480008 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: Sun Apr 28 21:46:45 2024 +0200 Timestamp: 1714333605 More reduction at cut nodes which are not a former PV node But the tt move and first killer are excluded. This idea is based on following LMR condition tuning https://tests.stockfishchess.org/tests/view/66228bed3fe04ce4cefc0c71 by using only the two largest terms P[0] and P[1]. Passed STC: LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 173248 W: 45091 L: 44565 D: 83592 Elo +1.05 Ptnml(0-2): 693, 20534, 43673, 21002, 722 https://tests.stockfishchess.org/tests/view/6629603b3fe04ce4cefc7d37 Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 722394 W: 183231 L: 181487 D: 357676 Elo +0.84 Ptnml(0-2): 462, 80650, 197252, 82348, 485 https://tests.stockfishchess.org/tests/view/662cbe45d46f72253dcff7bf closes https://github.com/official-stockfish/Stockfish/pull/5199 Bench: 1619613 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: Sun Apr 28 21:43:46 2024 +0200 Timestamp: 1714333426 Simplify non-pawn material divisor to a constant Passed STC: https://tests.stockfishchess.org/tests/view/662942603fe04ce4cefc7aba LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 272832 W: 70456 L: 70497 D: 131879 Elo -0.05 Ptnml(0-2): 1020, 32619, 69154, 32628, 995 Passed LTC: https://tests.stockfishchess.org/tests/view/662dfe3b6115ff6764c829eb LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 100254 W: 25446 L: 25303 D: 49505 Elo +0.50 Ptnml(0-2): 121, 11292, 27166, 11419, 129 closes https://github.com/official-stockfish/Stockfish/pull/5198 Bench: 1544645 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 28 21:36:34 2024 +0200 Timestamp: 1714332994 Penalise the TT move in multicut Passed STC: LLR: 2.99 (-2.94,2.94) <0.00,2.00> Total: 185504 W: 48079 L: 47533 D: 89892 Elo +1.02 Ptnml(0-2): 716, 21866, 46988, 22520, 662 https://tests.stockfishchess.org/tests/view/662d9e1d6115ff6764c7f83d Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 75612 W: 19351 L: 18948 D: 37313 Elo +1.85 Ptnml(0-2): 46, 8363, 20592, 8752, 53 https://tests.stockfishchess.org/tests/view/662dc9dc6115ff6764c80fea closes https://github.com/official-stockfish/Stockfish/pull/5195 Bench: 1415435 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 21:35:48 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 |