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Less LMR at root

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Do no LMR for the first four moves if at root node.

STC:
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 19686 W: 4524 L: 4261 D: 10901
http://tests.stockfishchess.org/tests/view/5cd3577b0ebc5925cf04a089

LTC:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 88335 W: 15193 L: 14766 D: 58376
http://tests.stockfishchess.org/tests/view/5cd35e600ebc5925cf04a1c3

Bench: 3184182
This commit is contained in:
Stefan Geschwentner 2019-05-08 21:40:46 +02:00 • committed by Stéphane Nicolet
parent b6d11028bb
commit 368f976fb6
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -1007,7 +1007,7 @@ moves_loop: // When in check, search starts from here
// Step 16. Reduced depth search (LMR). If the move fails high it will be
// re-searched at full depth.
if ( depth >= 3 * ONE_PLY
&& moveCount > 1
&& moveCount > 1 + 3 * rootNode
&& ( !captureOrPromotion
|| moveCountPruning
|| ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha))