+extern Bitboard RMasks[64];
+extern Bitboard RMagics[64];
+extern Bitboard* RAttacks[64];
+extern int RShifts[64];
+
+extern Bitboard BMasks[64];
+extern Bitboard BMagics[64];
+extern Bitboard* BAttacks[64];
+extern int BShifts[64];
+
+extern Bitboard SquareBB[64];