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Remove depth reduction in the full-depth search

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Passed simplification STC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 217184 W: 56218 L: 56195 D: 104771
Ptnml(0-2): 627, 25673, 55985, 25664, 643
https://tests.stockfishchess.org/tests/view/68a21e0eb6fb3300203bbcf3

Passed simplification LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 30474 W: 7923 L: 7713 D: 14838
Ptnml(0-2): 20, 3205, 8569, 3431, 12
https://tests.stockfishchess.org/tests/view/68a2adacb6fb3300203bc3f9

closes https://github.com/official-stockfish/Stockfish/pull/6246

bench 2626263
This commit is contained in:
Daniel Samek
2025-08-24 19:45:23 +02:00
committed by Joost VandeVondele
parent 57d76bd459
commit 2659351ce7
1 changed files with 0 additions and 3 deletions
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src/search.cpp
-3
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@@ -1252,9 +1252,6 @@ moves_loop: // When in check, search starts here
if (!ttData.move)
r += 1118;
if (depth < 5)
r += 1080;
// Note that if expected reduction is high, we reduce search depth here
value = -search<NonPV>(pos, ss + 1, -(alpha + 1), -alpha,
newDepth - (r > 3212) - (r > 4784 && newDepth > 2), !cutNode);