Nearly all competitive chess engines, including Bob Hyatt's Crafty, the strongest open source chess engine I know of, have lots of bit twiddling in them. http:

Nearly all competitive chess engines, including Bob Hyatt's Crafty, the strongest open source chess engine I know of, have lots of bit twiddling in them. http://en.wikipedia.org/wiki/Bitboard http://en.wikipedia.org/wiki/Bitboard