X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fbitboard.h;h=b64c92e1a4c54107ef2088ddf43d69c9cafc6871;hb=8df1cd10df0869f05916d1eb19e33b66127fcb86;hp=f8440a23a1aaf3f71635c672200786573d26b2b7;hpb=4e2e4759a146467b730b256567485706c0e00ab7;p=stockfish

diff --git a/src/bitboard.h b/src/bitboard.h
index f8440a23..b64c92e1 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -60,12 +60,11 @@ constexpr Bitboard Rank6BB = Rank1BB << (8 * 5);
 constexpr Bitboard Rank7BB = Rank1BB << (8 * 6);
 constexpr Bitboard Rank8BB = Rank1BB << (8 * 7);
 
-extern int SquareDistance[SQUARE_NB][SQUARE_NB];
+extern int8_t SquareDistance[SQUARE_NB][SQUARE_NB];
 
 extern Bitboard SquareBB[SQUARE_NB];
 extern Bitboard FileBB[FILE_NB];
 extern Bitboard RankBB[RANK_NB];
-extern Bitboard AdjacentFilesBB[FILE_NB];
 extern Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
 extern Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
 extern Bitboard LineBB[SQUARE_NB][SQUARE_NB];
@@ -195,7 +194,7 @@ constexpr Bitboard double_pawn_attacks_bb(Bitboard b) {
 /// adjacent files of the given one.
 
 inline Bitboard adjacent_files_bb(File f) {
-  return AdjacentFilesBB[f];
+  return shift<EAST>(FileBB[f]) | shift<WEST>(FileBB[f]);
 }