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Tweak LMR at Root

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Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 328192 W: 84751 L: 84014 D: 159427
Ptnml(0-2): 758, 38802, 84253, 39511, 772
https://tests.stockfishchess.org/tests/view/6689203959cb3228a4759a49

Passed LTC:
LLR: 2.95 (-2.94,2.94) <0.50,2.50>
Total: 56748 W: 14494 L: 14136 D: 28118
Ptnml(0-2): 19, 6089, 15803, 6441, 22
https://tests.stockfishchess.org/tests/view/66892d76e59d990b103f6626

closes https://github.com/official-stockfish/Stockfish/pull/5452

Bench 1253593
This commit is contained in:
Shawn Xu 2024-07-06 03:44:28 -07:00 • committed by Joost VandeVondele
parent b79ac764ff
commit 2d3ef434b4
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -1185,7 +1185,7 @@ moves_loop: // When in check, search starts here
r -= ss->statScore / 10898;
// Step 17. Late moves reduction / extension (LMR, ~117 Elo)
if (depth >= 2 && moveCount > 1 + rootNode)
if (depth >= 2 && moveCount > 1 + (rootNode && depth < 10))
{
// In general we want to cap the LMR depth search at newDepth, but when
// reduction is negative, we allow this move a limited search extension