Mister X and his 9 friends are numbered chips. One player, who plays Mister X, secretly notes one of the numbers and the chips are placed face-down on the board (a city map). The other players start the chase, using two dice. When they reach a chip, it is turned over. If Mister X is not among the first seven chips, he wins. If he is, the chase for the (now known) chip starts again (for the other players). This time, police cars are moved by a special disk which determines the moves for cars on different fields on the map. If a cop car can't make a legal move (or doesn't want to), the police players get a token ("Ermahnung"); when they collect 20 tokens they lose.