+#endif // defined(IS_64BIT)
+
+const Bitboard LightSquaresBB = 0x55AA55AA55AA55AAULL;
+const Bitboard DarkSquaresBB = 0xAA55AA55AA55AA55ULL;
+
+const Bitboard SquaresByColorBB[2] = { DarkSquaresBB, LightSquaresBB };
+
+const Bitboard FileBB[8] = {
+ FileABB, FileBBB, FileCBB, FileDBB, FileEBB, FileFBB, FileGBB, FileHBB
+};
+
+const Bitboard NeighboringFilesBB[8] = {
+ FileBBB, FileABB|FileCBB, FileBBB|FileDBB, FileCBB|FileEBB,
+ FileDBB|FileFBB, FileEBB|FileGBB, FileFBB|FileHBB, FileGBB
+};
+
+const Bitboard ThisAndNeighboringFilesBB[8] = {
+ FileABB|FileBBB, FileABB|FileBBB|FileCBB,
+ FileBBB|FileCBB|FileDBB, FileCBB|FileDBB|FileEBB,
+ FileDBB|FileEBB|FileFBB, FileEBB|FileFBB|FileGBB,
+ FileFBB|FileGBB|FileHBB, FileGBB|FileHBB
+};
+
+const Bitboard RankBB[8] = {
+ Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB
+};
+
+const Bitboard RelativeRankBB[2][8] = {
+ { Rank1BB, Rank2BB, Rank3BB, Rank4BB, Rank5BB, Rank6BB, Rank7BB, Rank8BB },
+ { Rank8BB, Rank7BB, Rank6BB, Rank5BB, Rank4BB, Rank3BB, Rank2BB, Rank1BB }
+};