X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=9685b9d429a24846dbc30acecf3adbc31680422c;hp=8366827804dea8a87afa2aaae09aa73ffb9ea79a;hb=20a6f99cdb87d5877d490abceb795f7e68c5b4a6;hpb=a44c5cf4f77b05a0385c127b7c26cf086a73120e

diff --git a/src/bitboard.h b/src/bitboard.h
index 83668278..9685b9d4 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -23,7 +23,6 @@
 
 #include "types.h"
 
-extern Bitboard SquaresByColorBB[2];
 extern Bitboard FileBB[8];
 extern Bitboard NeighboringFilesBB[8];
 extern Bitboard ThisAndNeighboringFilesBB[8];
@@ -226,6 +225,15 @@ inline bool squares_aligned(Square s1, Square s2, Square s3) {
 }
 
 
+/// same_color_squares() returns a bitboard representing all squares with
+/// the same color of the given square.
+
+inline Bitboard same_color_squares(Square s) {
+  return bit_is_set(0xAA55AA55AA55AA55ULL, s) ?  0xAA55AA55AA55AA55ULL
+                                              : ~0xAA55AA55AA55AA55ULL;
+}
+
+
 /// first_1() finds the least significant nonzero bit in a nonzero bitboard.
 /// pop_1st_bit() finds and clears the least significant nonzero bit in a
 /// nonzero bitboard.