const Bitboard FileABB = 0x0101010101010101ULL;
const Bitboard FileBBB = 0x0202020202020202ULL;
const Bitboard FileCBB = 0x0404040404040404ULL;
const Bitboard FileABB = 0x0101010101010101ULL;
const Bitboard FileBBB = 0x0202020202020202ULL;
const Bitboard FileCBB = 0x0404040404040404ULL;