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Tweak the logic for setting the improving flag

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Tweak the logic for setting the improving flag when the static evaluation is significantly higher than alpha.

Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 92320 W: 24057 L: 23664 D: 44599
Ptnml(0-2): 247, 10689, 23893, 11086, 245
https://tests.stockfishchess.org/tests/view/68860aba966ed85face248a1

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 281292 W: 72496 L: 71683 D: 137113
Ptnml(0-2): 135, 30289, 78995, 31082, 145
https://tests.stockfishchess.org/tests/view/6886168c966ed85face24962

closes https://github.com/official-stockfish/Stockfish/pull/6180

Bench: 3200439
This commit is contained in:
FauziAkram
2025-07-28 19:45:13 +02:00
committed by Joost VandeVondele
parent 402602a70d
commit 4fcfb0b4b7
2 changed files with 8 additions and 6 deletions
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src/search.h
+2 -1
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@@ -298,7 +298,8 @@ class Worker {
void iterative_deepening();
void do_move(Position& pos, const Move move, StateInfo& st, Stack* const ss);
void do_move(Position& pos, const Move move, StateInfo& st, const bool givesCheck, Stack* const ss);
void
do_move(Position& pos, const Move move, StateInfo& st, const bool givesCheck, Stack* const ss);
void do_null_move(Position& pos, StateInfo& st);
void undo_move(Position& pos, const Move move);
void undo_null_move(Position& pos);