Less aggressive move count based futility pruning

[stockfish] / src / search.cpp

diff --git a/src/search.cpp b/src/search.cpp
index bd482eaeb769d1a63f6e55c17903e29c797c38bb..24c741aa1cad237909e561f595335f9f9b52d015 100644 (file)
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -366,7 +366,7 @@ void init_search() {
 
   // Init futility move count array
   for (d = 0; d < 32; d++)
-      FutilityMoveCountArray[d] = 3 + (1 << (3 * d / 8));
+      FutilityMoveCountArray[d] = int(3.001 + 0.25 * pow(d, 2.0));
 }