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Tuned history reduction

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Value after a long Bayesian tuning, using a home-made classification approach.

STC
https://tests.stockfishchess.org/tests/view/5e7c7b16e42a5c3b3ca2eb66
LLR: 2.96 (-2.94,2.94) {-0.50,1.50}
Total: 45472 W: 8992 L: 8732 D: 27748
Ptnml(0-2): 795, 5276, 10352, 5500, 813

LTC
https://tests.stockfishchess.org/tests/view/5e7c8be7e42a5c3b3ca2eb75
LLR: 2.94 (-2.94,2.94) {0.25,1.75}
Total: 22744 W: 3085 L: 2849 D: 16810
Ptnml(0-2): 156, 2090, 6658, 2298, 170

closes https://github.com/official-stockfish/Stockfish/pull/2597

Bench 5030855
This commit is contained in:
Lyudmil Antonov 2020-02-17 11:13:03 +02:00 • committed by Joost VandeVondele
parent c8e8e48b14
commit 58746d9fb8
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -1182,7 +1182,7 @@ moves_loop: // When in check, search starts from here
r++;
// Decrease/increase reduction for moves with a good/bad history (~30 Elo)
r -= ss->statScore / 16384;
r -= ss->statScore / 16434;
}
// Increase reduction for captures/promotions if late move and at low depth