The game was conceived by Aldo Spinelli in 1989 and develops on a chessboard of 4 squares per side. Each player has a traditional six-sided die, which is moved from one square to another in an orthogonal direction, rotating on an edge of his choice as many times as the value expressed by the top face. The dice can change direction after each rotation and can also retrace the squares already traveled during the same move. The die can only pass into empty squares. The player who manages to finish his move in the square occupied by the opponent wins, so that, after the last rotation, his die shows on the upper face a value identical to that indicated at that moment by the upper face of the enemy die.