Chess engine: Stockfish 20011311

Stockfish - UCI chess engine, compiled by Vizvezdenec

Tweak futility pruning constants
Based on recent improvement of futility pruning by @locutus2 : we lower the futility margin to apply it for more nodes but as a compensation we also lower the history threshold to apply it to less nodes. Further work in tweaking constants can always be done - numbers are guessed
"by hand" and are not results of some tuning, maybe there is some more
Elo to squeeze from this part of code.

Passed STC
LLR: 2.98 (-2.94,2.94) {-1.00,3.00}
Total: 15300 W: 3081 L: 2936 D: 9283 Elo +3.29
Ptnml(0-2): 260, 1816, 3382, 1900, 290

Passed LTC
LLR: 2.94 (-2.94,2.94) {0.00,2.00}
Total: 108670 W: 14509 L: 14070 D: 80091 Elo +1.40
Ptnml(0-2): 813, 10259, 31736, 10665, 831

Bench: 4643972


Rating JCER=3344

Stockfish 20011311 - download