X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fbitboard.h;h=0cf0cd0a83021bb1d0a95abdc811287abc05dea2;hb=d29a68f5854d0b529f2e0447fddcc6a61200c5aa;hp=9814268327afdd9c269d728077d1f82770035c87;hpb=a66e6e5ad903218a612fdaaf027999b9d48a0294;p=stockfish

diff --git a/src/bitboard.h b/src/bitboard.h
index 98142683..0cf0cd0a 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -21,6 +21,8 @@
 #ifndef BITBOARD_H_INCLUDED
 #define BITBOARD_H_INCLUDED
 
+#include <string>
+
 #include "types.h"
 
 namespace Bitboards {
@@ -117,11 +119,11 @@ inline int square_distance(Square s1, Square s2) {
 }
 
 inline int file_distance(Square s1, Square s2) {
-  return abs(file_of(s1) - file_of(s2));
+  return dist(file_of(s1), file_of(s2));
 }
 
 inline int rank_distance(Square s1, Square s2) {
-  return abs(rank_of(s1) - rank_of(s2));
+  return dist(rank_of(s1), rank_of(s2));
 }