-/// in_front_bb() takes a color and a rank or square as input, and returns a
-/// bitboard representing all the squares on all ranks in front of the rank
-/// (or square), from the given color's point of view. For instance,
-/// in_front_bb(WHITE, RANK_5) will give all squares on ranks 6, 7 and 8, while
-/// in_front_bb(BLACK, SQ_D3) will give all squares on ranks 1 and 2.
-
-inline Bitboard in_front_bb(Color c, Rank r) {
- return InFrontBB[c][r];
-}
+/// adjacent_files_bb() returns a bitboard representing all the squares on the
+/// adjacent files of the given one.