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Removing contHist[1] from pruning formula

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Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 51552 W: 13297 L: 13091 D: 25164
Ptnml(0-2): 166, 6009, 13215, 6225, 161
https://tests.stockfishchess.org/tests/view/67c4de79685e87e15e7c43f5

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 244554 W: 62135 L: 62142 D: 120277
Ptnml(0-2): 137, 26612, 68794, 26589, 145
https://tests.stockfishchess.org/tests/view/67c50982685e87e15e7c443d

closes https://github.com/official-stockfish/Stockfish/pull/5928

Bench: 1980385
This commit is contained in:
FauziAkram
2025-03-21 11:16:27 +01:00
committed by Disservin
parent fc0e0a44d4
commit 4afd7f1a7b
1 changed files with 1 additions and 2 deletions
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src/search.cpp
+1 -2
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@@ -1679,10 +1679,9 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta)
// Continuation history based pruning // Continuation history based pruning
if (!capture if (!capture
&& (*contHist[0])[pos.moved_piece(move)][move.to_sq()] && (*contHist[0])[pos.moved_piece(move)][move.to_sq()]
+ (*contHist[1])[pos.moved_piece(move)][move.to_sq()]
+ thisThread->pawnHistory[pawn_structure_index(pos)][pos.moved_piece(move)] + thisThread->pawnHistory[pawn_structure_index(pos)][pos.moved_piece(move)]
[move.to_sq()] [move.to_sq()]
<= 5923) <= 6290)
continue; continue;
// Do not search moves with bad enough SEE values // Do not search moves with bad enough SEE values