!! latest version !!Windows x64 for Haswell CPUsWindows x64 for modern computers + AVX2Windows x64 for modern computersWindows x64 + SSSE3Windows x64Linux x64 for Haswell CPUsLinux x64 for modern computers + AVX2Linux x64 for modern computersLinux x64 + SSSE3Linux x64Author: Michael Chaly
Date: Wed Mar 8 07:16:09 2023 +0100
Timestamp: 1678256169
Do more negative extensions
This patch does negatively extend transposition table move if singular search failed and tt value is not bigger than alpha.
Logic is close to what we had before recent simplification of negative extensions but uses or condition instead of and condition.
Passed STC:
https://tests.stockfishchess.org/tests/view/6404c8102644b62c33934607 LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 119040 W: 31841 L: 31416 D: 55783
Elo +1.24Ptnml(0-2): 356, 13070, 32292, 13397, 405
Passed LTC:
https://tests.stockfishchess.org/tests/view/6405abda2644b62c33937119 LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 47216 W: 12816 L: 12496 D: 21904
Elo +2.35Ptnml(0-2): 12, 4500, 14286, 4776, 34
closes
https://github.com/official-stockfish/Stockfish/pull/4430 bench 4747020
see source
_________________
Bettina...............The greatest happiness of life is the conviction that we are loved.
Victor Hugo