Take in account odd depths in razoring formula

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index f7f62b2344e7c5d2837fd21698d3b222a274771a..45e0888d5efbfb58493075fb0b1c6699615046f6 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -1247,8 +1247,8 @@ namespace {
     {
         Value v = qsearch(pos, ss, beta-1, beta, Depth(0), ply, threadID);
         if (   (v < beta - RazorMargin - RazorMargin / 4)
-            || (depth <= 2*OnePly && v < beta - RazorMargin)
-            || (depth <=   OnePly && v < beta - RazorMargin / 2))
+            || (depth < 3*OnePly && v < beta - RazorMargin)
+            || (depth < 2*OnePly && v < beta - RazorMargin / 2))
             return v;
     }