X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fbitboard.h;h=0cf0cd0a83021bb1d0a95abdc811287abc05dea2;hb=d12378497cb24f40d3510cdcfaecd1335f523196;hp=9814268327afdd9c269d728077d1f82770035c87;hpb=da2f8880b96004505e27b0b87f5df5bfe67a72a9;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));
 }