The object of the game is to manoeuvre the other player into a position on the board where he cannot move his L piece. Play against the iDevice or a friend.
Each player has only one piece. The board is four squares by four squares. The game is easier to learn and play than noughts and crosses and yet can be played with a high degree of skill.
Skill is required because there are so many moves. There are over 18,000 positions for the pieces on the small board and at any moment there may be as many as 195 different moves of which only one is successful.