-/// adjacent_files_bb() returns a bitboard representing all the squares on the
-/// adjacent files of the given one.
-
-inline Bitboard adjacent_files_bb(File f) {
- return shift<EAST>(file_bb(f)) | shift<WEST>(file_bb(f));
-}
-
-
-/// between_bb() returns a bitboard representing all the squares between the two
-/// given ones. For instance, between_bb(SQ_C4, SQ_F7) returns a bitboard with
-/// the bits for square d5 and e6 set. If s1 and s2 are not on the same rank,
-/// file or diagonal, 0 is returned.
-
-inline Bitboard between_bb(Square s1, Square s2) {
- return BetweenBB[s1][s2];
-}
-