Latest abrok Development Version May 29th (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: xoto10 Date: Sun May 29 19:14:20 2022 +0200 Timestamp: 1653844460 Adjust scale param higher xoto10's scaleopt tune resulted in a yellow LTC, but the main parameter shift looked almost exactly like the tune rate reduction schedule, so further increases of that param were tried. Joint work xoto10 and dubslow. passed LTC: https://tests.stockfishchess.org/tests/view/628c709372775f382300f03e LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 70112 W: 18932 L: 18584 D: 32596 Elo +1.72 Ptnml(0-2): 66, 6904, 20757, 7274, 55 failed STC: https://tests.stockfishchess.org/tests/view/6290e4441e7cd5f29966bdc8 LLR: -2.96 (-2.94,2.94) <0.00,2.50> Total: 59976 W: 15919 L: 16018 D: 28039 Elo -0.57 Ptnml(0-2): 250, 6791, 15974, 6754, 219 similar LTC's were yellow first yellow LTC: https://tests.stockfishchess.org/tests/view/6288a33f817227d3e5c5b05d double exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e140372775f38230129a6 triple exaggerate yellow: https://tests.stockfishchess.org/tests/live_elo/628e2caf72775f3823012d45 closes https://github.com/official-stockfish/Stockfish/pull/4036 bench 6410652 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: proukornew Date: Sun May 29 19:04:25 2022 +0200 Timestamp: 1653843865 Improve handling of variables set in the make environment removes duplication on the commandline for example in a profile-build closes https://github.com/official-stockfish/Stockfish/pull/3859 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: Giacomo Lorenzetti Date: Sun May 29 18:54:19 2022 +0200 Timestamp: 1653843259 Small speedup in futility_move_count The speedup is around 0.25% using gcc 11.3.1 (bmi2, nnue bench, depth 16 and 23) while it is neutral using clang (same conditions). According to `perf` that integer division was one of the most time-consuming instructions in search (gcc disassembly). Passed STC: https://tests.stockfishchess.org/tests/view/628a17fe24a074e5cd59b3aa LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 22232 W: 5992 L: 5751 D: 10489 Elo +3.77 Ptnml(0-2): 88, 2235, 6218, 2498, 77 yellow LTC: https://tests.stockfishchess.org/tests/view/628a35d7ccae0450e35106f7 LLR: -2.95 (-2.94,2.94) <0.50,3.00> Total: 320168 W: 85853 L: 85326 D: 148989 Elo +0.57 Ptnml(0-2): 185, 29698, 99821, 30165, 215 This patch also suggests that UHO STC is sensible to small speedups (< 0.50%). closes https://github.com/official-stockfish/Stockfish/pull/4032 No functional change see source

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