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Tweak History Bonus

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Inspired by @Ergodice , who came up first with the idea.

Passed STC:
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 18400 W: 4867 L: 4576 D: 8957
Ptnml(0-2): 52, 2052, 4714, 2317, 65
https://tests.stockfishchess.org/tests/view/68062a3c98cd372e3aea5959

Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 454338 W: 116461 L: 115294 D: 222583
Ptnml(0-2): 198, 49139, 127346, 50270, 216
https://tests.stockfishchess.org/tests/view/6806347c98cd372e3aea5967

Passed VLTC non-reg:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 385970 W: 98401 L: 98546 D: 189023
Ptnml(0-2): 51, 38958, 115105, 38827, 44
https://tests.stockfishchess.org/tests/view/680cfe873629b02d74b155cf

closes https://github.com/official-stockfish/Stockfish/pull/6030

Bench: 1715817
This commit is contained in:
FauziAkram
2025-04-27 20:14:38 +02:00
committed by Disservin
parent e5aa4b48c6
commit 267fd8a3d5
1 changed files with 5 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+5 -3
View File
@@ -1962,12 +1962,14 @@ void update_quiet_histories(
workerThread.mainHistory[us][move.from_to()] << bonus; // Untuned to prevent duplicate effort
if (ss->ply < LOW_PLY_HISTORY_SIZE)
workerThread.lowPlyHistory[ss->ply][move.from_to()] << bonus * 829 / 1024;
workerThread.lowPlyHistory[ss->ply][move.from_to()] << bonus * 800 / 1024;
update_continuation_histories(ss, pos.moved_piece(move), move.to_sq(), bonus * 1004 / 1024);
update_continuation_histories(ss, pos.moved_piece(move), move.to_sq(),
bonus * (bonus > 0 ? 1094 : 790) / 1024);
int pIndex = pawn_structure_index(pos);
workerThread.pawnHistory[pIndex][pos.moved_piece(move)][move.to_sq()] << bonus * 587 / 1024;
workerThread.pawnHistory[pIndex][pos.moved_piece(move)][move.to_sq()]
<< bonus * (bonus > 0 ? 725 : 460) / 1024;
}
}