X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fsquare.h;fp=src%2Fsquare.h;h=d35d72bfd5b21311f1b2be9b79d05c597016d76f;hp=aa3585c11d3d80659770899bb324c3dd8b3545fa;hb=9b1d5bd5343540db412c50ae2944246e3f25d18b;hpb=a84e4b20491f69d2b6f64e4f9738fc8ba3394990

diff --git a/src/square.h b/src/square.h
index aa3585c1..d35d72bf 100644
--- a/src/square.h
+++ b/src/square.h
@@ -139,6 +139,11 @@ inline Color square_color(Square s) {
   return Color((int(square_file(s)) + int(square_rank(s))) & 1);
 }
 
+inline bool same_color_squares(Square s1, Square s2) {
+  int s = int(s1) ^ int(s2);
+  return (((s >> 3) ^ s) & 1) == 0;
+}
+
 inline int file_distance(File f1, File f2) {
   return abs(int(f1) - int(f2));
 }