-extern Bitboard RookMasks [SQUARE_NB];
-extern Bitboard RookMagics [SQUARE_NB];
-extern Bitboard* RookAttacks[SQUARE_NB];
-extern unsigned RookShifts [SQUARE_NB];
-
-extern Bitboard BishopMasks [SQUARE_NB];
-extern Bitboard BishopMagics [SQUARE_NB];
-extern Bitboard* BishopAttacks[SQUARE_NB];
-extern unsigned BishopShifts [SQUARE_NB];
-