Latest abrok Development Version April 5th (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: Michael Chaly Date: Wed Apr 5 08:23:54 2023 +0200 Timestamp: 1680675834 Assign negative stat bonuses for quiet moves at Pv nodes This patch assigns negative stat bonuses for quiet moves at pv nodes which are searched at depth greater than this node assumes, so are extended. Passed STC: https://tests.stockfishchess.org/tests/view/6426198bdb43ab2ba6f9cfa2 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 548944 W: 147287 L: 146254 D: 255403 Elo +0.65 Ptnml(0-2): 1662, 59772, 150671, 60605, 1762 Passed LTC: https://tests.stockfishchess.org/tests/view/642be4f177ff3301150d892d LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 93352 W: 25400 L: 24994 D: 42958 Elo +1.51 Ptnml(0-2): 44, 8817, 28547, 9225, 43 closes https://github.com/official-stockfish/Stockfish/pull/4495 bench 5044536 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: Wed Apr 5 08:18:53 2023 +0200 Timestamp: 1680675533 Simplify away piece count condition for useClassical Simplify away the piece count condition for useClassical. In compensation, the psq requirement is increased by 15%. Also updated the Elo estimate for useClassical, based on recent testing. Simplification STC: https://tests.stockfishchess.org/tests/view/642acbb577ff3301150d3ef5 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 51984 W: 13906 L: 13707 D: 24371 Elo +1.33 Ptnml(0-2): 150, 5638, 14227, 5817, 160 Simplification LTC: https://tests.stockfishchess.org/tests/view/642b9c5777ff3301150d778a LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 119696 W: 32412 L: 32300 D: 54984 Elo +0.33 Ptnml(0-2): 53, 11529, 36567, 11651, 48 closes https://github.com/official-stockfish/Stockfish/pull/4494 Bench: 5089321 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 5 08:15:34 2023 +0200 Timestamp: 1680675334 Parameters Tweak Passed STC LLR: 3.22 (-2.94,2.94) <0.00,2.00> Total: 664048 W: 177526 L: 176301 D: 310221 Elo +0.64 Ptnml(0-2): 2002, 72968, 180891, 74129, 2034 https://tests.stockfishchess.org/tests/view/64219901db43ab2ba6f901fa Passed LTC: LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 77576 W: 21125 L: 20750 D: 35701 Elo +1.68 Ptnml(0-2): 24, 7350, 23669, 7717, 28 https://tests.stockfishchess.org/tests/view/642abe3377ff3301150d3a16 closes https://github.com/official-stockfish/Stockfish/pull/4493 bench: 4522076 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 Apr 5 08:13:34 2023 +0200 Timestamp: 1680675214 Simplifiy TM's root complexity Also requires moving optimism initialization, this is a very early `evaluate()` call. STC: https://tests.stockfishchess.org/tests/view/6428c39677ff3301150ca0d7 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 51256 W: 13805 L: 13612 D: 23839 Elo +1.31 Ptnml(0-2): 145, 5283, 14592, 5450, 158 LTC: https://tests.stockfishchess.org/tests/view/64296ff377ff3301150cc519 LLR: 2.94 (-2.94,2.94) <-1.75,0.25> Total: 106968 W: 28951 L: 28830 D: 49187 Elo +0.39 Ptnml(0-2): 47, 9746, 33789, 9843, 59 closes https://github.com/official-stockfish/Stockfish/pull/4492 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: Miguel Lahoz Date: Wed Apr 5 08:10:34 2023 +0200 Timestamp: 1680675034 Remove unneeded bitboard from MP Recent simplification has removed the need for an extra bitboard in MP struct. Use a local variable instead. STC: Passed Non-regression test https://tests.stockfishchess.org/tests/view/64294ae677ff3301150cba16 LLR: 2.96 (-2.94,2.94) <-1.75,0.25> Total: 64872 W: 17383 L: 17203 D: 30286 Elo +0.96 Ptnml(0-2): 179, 6675, 18546, 6859, 177 closes https://github.com/official-stockfish/Stockfish/pull/4490 No functional change. see source

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