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Simplify NMP reduction formula

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Passed STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 178912 W: 46625 L: 46559 D: 85728
Ptnml(0-2): 540, 21167, 45975, 21235, 539
https://tests.stockfishchess.org/tests/view/69060677ea4b268f1fac1f25

Passed LTC:
LLR: 2.99 (-2.94,2.94) <-1.75,0.25>
Total: 140988 W: 36278 L: 36176 D: 68534
Ptnml(0-2): 82, 15520, 39215, 15568, 109
https://tests.stockfishchess.org/tests/view/6908bc32ea4b268f1fac288f

closes https://github.com/official-stockfish/Stockfish/pull/6416

bench: 2959834
This commit is contained in:
FauziAkram
2025-11-14 17:24:16 +01:00
committed by Joost VandeVondele
parent 229bd1e2e3
commit df88db16c6
1 changed files with 1 additions and 1 deletions
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src/search.cpp
+1 -1
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@@ -872,7 +872,7 @@ Value Search::Worker::search(
assert((ss - 1)->currentMove != Move::null());
// Null move dynamic reduction based on depth
Depth R = 6 + depth / 3 + improving;
Depth R = 7 + depth / 3;
do_null_move(pos, st, ss);
Value nullValue = -search<NonPV>(pos, ss + 1, -beta, -beta + 1, depth - R, false);