Raise penalty for knight attacked by pawn

[stockfish] / src / evaluate.h

diff --git a/src/evaluate.h b/src/evaluate.h
index 4fe71388301c90ea35c810afa666d844d8370c14..d859582a6681e7284eca05e4c3e2e1955f06bda3 100644 (file)
--- a/src/evaluate.h
+++ b/src/evaluate.h
@@ -20,6 +20,8 @@
 #ifndef EVALUATE_H_INCLUDED
 #define EVALUATE_H_INCLUDED
 
+#include <string>
+
 #include "types.h"
 
 class Position;