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Adjust ButterflyHistory decay parameter

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passed STC:
LLR: 2.98 (-2.94,2.94) <-0.50,2.50>
Total: 26680 W: 6807 L: 6593 D: 13280
Ptnml(0-2): 73, 3007, 6989, 3175, 96
https://tests.stockfishchess.org/tests/view/6174094e6ce927be32558441

passed LTC:
LLR: 2.98 (-2.94,2.94) <0.50,3.50>
Total: 21104 W: 5403 L: 5185 D: 10516
Ptnml(0-2): 8, 2160, 6001, 2372, 11
https://tests.stockfishchess.org/tests/view/61744927351812fe5f969864

closes https://github.com/official-stockfish/Stockfish/pull/3761

Bench: 6334068
This commit is contained in:
Joost VandeVondele 2021-10-23 15:02:59 +02:00 • committed by Stéphane Nicolet
parent 8557f35aa5
commit 2c86ae196d
1 changed files with 1 additions and 1 deletions
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2
src/movepick.h
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@ -86,7 +86,7 @@ enum StatsType { NoCaptures, Captures };
/// unsuccessful during the current search, and is used for reduction and move
/// ordering decisions. It uses 2 tables (one for each color) indexed by
/// the move's from and to squares, see www.chessprogramming.org/Butterfly_Boards
typedef Stats<int16_t, 13365, COLOR_NB, int(SQUARE_NB) * int(SQUARE_NB)> ButterflyHistory;
typedef Stats<int16_t, 14365, COLOR_NB, int(SQUARE_NB) * int(SQUARE_NB)> ButterflyHistory;
/// At higher depths LowPlyHistory records successful quiet moves near the root
/// and quiet moves which are/were in the PV (ttPv). LowPlyHistory is populated during