Simplify Tweak late move reductions at root.

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 985af7bc2dc7433b63da3439cb0c03b2ed3fb405..9562bf8640d4e8b04772d0e915281107e6218f97 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1115,7 +1115,7 @@ moves_loop: // When in check, search starts from here
       // Step 16. Reduced depth search (LMR, ~200 Elo). If the move fails high it will be
       // re-searched at full depth.
       if (    depth >= 3
-          &&  moveCount > 1 + rootNode + (rootNode && bestValue < alpha)
+          &&  moveCount > 1 + 2 * rootNode
           && (!rootNode || thisThread->best_move_count(move) == 0)
           && (  !captureOrPromotion
               || moveCountPruning