Tweak stat bonus

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 325278fbc95acab4d559b94ae7a1787d2f8b0b9b..aa27ec2b02eec827a5bb7b5b7092d2043044d041 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -82,7 +82,7 @@ namespace {
   // History and stats update bonus, based on depth
   int stat_bonus(Depth depth) {
     int d = depth / ONE_PLY;
-    return d > 17 ? 0 : 32 * d * d + 64 * d - 64;
+    return d > 17 ? 0 : 33 * d * d + 66 * d - 66;
   }
 
   // Skill structure is used to implement strength limit