Chess960 (also known as Fischer Random Chess) is a variation of the game invented and advocated by Bobby Fischer. The pieces and pawns have their normal moves, but the setup of pieces on the first rank is random, except that two rules must be followed: the king must be placed on a square between the rooks, and the bishops are placed on squares of opposite color. Black's pieces are placed opposite White's. The random setup can be established by dice toss, computer program, playing cards, or other methods. Castling may be done; the special Chess960 rules governing castling incorporate the normal castling in classic chess.