-namespace {
-
- // De Bruijn sequences. See chessprogramming.wikispaces.com/BitScan
- const uint64_t DeBruijn_64 = 0x218A392CD3D5DBFULL;
- const uint32_t DeBruijn_32 = 0x783A9B23;
-
- CACHE_LINE_ALIGNMENT
-
- int BSFTable[64];
- int MS1BTable[256];
- Bitboard RTable[0x19000]; // Storage space for rook attacks
- Bitboard BTable[0x1480]; // Storage space for bishop attacks
- uint8_t BitCount8Bit[256];
-
- typedef unsigned (Fn)(Square, Bitboard);
-
- void init_magics(Bitboard table[], Bitboard* attacks[], Bitboard magics[],
- Bitboard masks[], unsigned shifts[], Square deltas[], Fn index);
-}
-
-/// lsb()/msb() finds the least/most significant bit in a nonzero bitboard.
-/// pop_lsb() finds and clears the least significant bit in a nonzero bitboard.
-
-#if !defined(USE_BSFQ)
-
-Square lsb(Bitboard b) {
-
- if (Is64Bit)
- return Square(BSFTable[((b & -b) * DeBruijn_64) >> 58]);
-
- b ^= (b - 1);
- uint32_t fold = unsigned(b) ^ unsigned(b >> 32);
- return Square(BSFTable[(fold * DeBruijn_32) >> 26]);
-}
-
-Square pop_lsb(Bitboard* b) {
-
- Bitboard bb = *b;
- *b = bb & (bb - 1);
-
- if (Is64Bit)
- return Square(BSFTable[((bb & -bb) * DeBruijn_64) >> 58]);
+uint8_t PopCnt16[1 << 16];
+int SquareDistance[SQUARE_NB][SQUARE_NB];
+
+Bitboard SquareBB[SQUARE_NB];
+Bitboard FileBB[FILE_NB];
+Bitboard RankBB[RANK_NB];
+Bitboard AdjacentFilesBB[FILE_NB];
+Bitboard ForwardRanksBB[COLOR_NB][RANK_NB];
+Bitboard BetweenBB[SQUARE_NB][SQUARE_NB];
+Bitboard LineBB[SQUARE_NB][SQUARE_NB];
+Bitboard DistanceRingBB[SQUARE_NB][8];
+Bitboard ForwardFileBB[COLOR_NB][SQUARE_NB];
+Bitboard PassedPawnMask[COLOR_NB][SQUARE_NB];
+Bitboard PawnAttackSpan[COLOR_NB][SQUARE_NB];
+Bitboard PseudoAttacks[PIECE_TYPE_NB][SQUARE_NB];
+Bitboard PawnAttacks[COLOR_NB][SQUARE_NB];
+
+Magic RookMagics[SQUARE_NB];
+Magic BishopMagics[SQUARE_NB];