Take in account odd depths in razoring formula

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 3529627fd4d946949c9794b487f6c7eea44b25c8..45e0888d5efbfb58493075fb0b1c6699615046f6 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1241,7 +1241,7 @@ namespace {
     else if (   !value_is_mate(beta)
              && approximateEval < beta - RazorMargin
              && depth < RazorDepth
-             && (RazorAtDepthOne || depth >= 2*OnePly)
+             && (RazorAtDepthOne || depth > OnePly)
              && ttMove == MOVE_NONE
              && !pos.has_pawn_on_7th(pos.side_to_move()))
     {