Simplify futility move count formula

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index 442f7f5ddc3e4fda6592ac903407d3f4f04550a4..7e9b8d77216ae788475f4e7b351297d8b21dcdf8 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -155,8 +155,8 @@ void Search::init() {
   // Init futility move count array
   for (d = 0; d < 32; ++d)
   {
-      FutilityMoveCounts[0][d] = int(3 + 0.3 * pow(double(d       ), 1.8)) * 3/4 + (2 < d && d < 5);
-      FutilityMoveCounts[1][d] = int(3 + 0.3 * pow(double(d + 0.98), 1.8));
+      FutilityMoveCounts[0][d] = int(2.4 + 0.222 * pow(d +  0.0, 1.8));
+      FutilityMoveCounts[1][d] = int(3.0 +   0.3 * pow(d + 0.98, 1.8));
   }
 }