Latest abrok Development Version 8th October (SF The gift that keeps on giving

!! 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: Taras Vuk Date: Sun Oct 8 07:56:07 2023 +0200 Timestamp: 1696744567 Skip futility pruning if ttMove has bad history Passed STC: LLR: 2.96 (-2.94,2.94) <0.00,2.00> Total: 52416 W: 13465 L: 13128 D: 25823 Elo +2.23 Ptnml(0-2): 128, 6024, 13604, 6287, 165 https://tests.stockfishchess.org/tests/view/651fadd4ac577114367277bf Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 87348 W: 22234 L: 21818 D: 43296 Elo +1.65 Ptnml(0-2): 38, 9240, 24698, 9664, 34 https://tests.stockfishchess.org/tests/view/65201932ac57711436728218 closes https://github.com/official-stockfish/Stockfish/pull/4825 bench: 1246560 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: gabe Date: Sun Oct 8 07:52:16 2023 +0200 Timestamp: 1696744336 Avoid recomputing moveCountPruning In search, when moveCountPruning becomes true, it can never turn false again. Passed STC https://tests.stockfishchess.org/tests/view/652075ceac57711436728aac LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 136448 W: 34923 L: 34472 D: 67053 Elo +1.15 Ptnml(0-2): 420, 15094, 36767, 15501, 442 closes https://github.com/official-stockfish/Stockfish/pull/4823 Non functional change see source
Windows x64 for Haswell CPUs Windows x64 for modern computers + AVX2 Windows x64 for modern computers Windows x64 + SSSE3 Windows x64 Linux x64 for Haswell CPUs Linux x64 for modern computers + AVX2 Linux x64 for modern computers Linux x64 + SSSE3 Linux x64	Author: candirufish Date: Sun Oct 8 07:50:03 2023 +0200 Timestamp: 1696744203 Razor more if ss+1 cutoffCnt > 3 STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 221760 W: 56726 L: 56144 D: 108890 Elo +0.91 Ptnml(0-2): 655, 25453, 58123, 25953, 696 https://tests.stockfishchess.org/tests/view/651d34dbcff46e538ee05d91 LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 130326 W: 33188 L: 32681 D: 64457 Elo +1.35 Ptnml(0-2): 69, 13949, 36620, 14456, 69 https://tests.stockfishchess.org/tests/view/651f844eac577114367273d5 closes https://github.com/official-stockfish/Stockfish/pull/4822 bench: 1291708 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 Oct 8 07:46:26 2023 +0200 Timestamp: 1696743986 Simplify collection of bad moves for history updates. 1. collect only the first 32 moves searched and ignore the rest. So late bad moves get no further negative history updates. 2. collect now for quiet moves also at most 32 bad moves STC: https://tests.stockfishchess.org/tests/view/6517b3aeb3e74811c8af5651 LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 51168 W: 13013 L: 12810 D: 25345 Elo +1.38 Ptnml(0-2): 120, 6006, 13186, 6095, 177 LTC: https://tests.stockfishchess.org/tests/view/651adafecff46e538ee02734 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 109866 W: 27786 L: 27656 D: 54424 Elo +0.41 Ptnml(0-2): 52, 11816, 31069, 11942, 54 closes https://github.com/official-stockfish/Stockfish/pull/4818 Bench: 1338617 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 Oct 8 07:42:39 2023 +0200 Timestamp: 1696743759 Optimize the most common update accumalator cases w/o tiling In the most common case where we only update a single state it's faster to not use temporary accumulation registers and tiling. (Also includes a couple of small cleanups.) passed STC https://tests.stockfishchess.org/tests/view/651918e3cff46e538ee0023b LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 34944 W: 8989 L: 8687 D: 17268 Elo +3.00 Ptnml(0-2): 88, 3743, 9512, 4037, 92 A simpler version https://tests.stockfishchess.org/tests/view/65190dfacff46e538ee00155 also passed but this version is stronger still https://tests.stockfishchess.org/tests/view/6519b95fcff46e538ee00fa2 closes https://github.com/official-stockfish/Stockfish/pull/4816 No functional change see source

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