X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=f8440a23a1aaf3f71635c672200786573d26b2b7;hp=c6dbc647b093dfe1c8d5d425554a76161138adeb;hb=5446e6f408f2ed7fa281dbe0097c46674d193260;hpb=9dc6d270fc207d6715578b57a1cdf655527ec5fe

diff --git a/src/bitboard.h b/src/bitboard.h
index c6dbc647..f8440a23 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -135,6 +135,10 @@ constexpr bool more_than_one(Bitboard b) {
   return b & (b - 1);
 }
 
+inline bool opposite_colors(Square s1, Square s2) {
+  return bool(DarkSquares & s1) != bool(DarkSquares & s2);
+}
+
 /// rank_bb() and file_bb() return a bitboard representing all the squares on
 /// the given file or rank.