Chess960, also known as Fischer Random Chess, is a chess variation created by Bobby Fischer. The initial position of the chess pieces is randomized forcing the player to rely more on creativity and talent than on memorizing opening moves. There are 960 possible starting positions.

1. Move the king outside the playing surface, next to his final position. The rook is then moved from it starting to ending position, then the king is placed on his final square.
2. If only the rook needs to move (jumping over the king), you can simply move only the rook.
3. If only the king needs to move (jumping over the castling rook), you can simply move the king.
4. Transposition castling is when both the king and rook are placed in their final squares.
5. Double-move castling is when the king is moved to its final square and the rook is moved to its final square on separate moves.