Labyrinth (effect)

Labyrinth was an effect published by Karl Fulves in 1980 which he developed with Sam Schwartz.

A square maze with four entrances is assembled from five cards. The spectator freely chooses 3 of the four entrances for himself, leaving one entrance for the magician. A bet is made that the person who can trace a path to the center of the maze wins. It is found that the path chosen for the magician is the only one that leads to the center of the maze. One and only one entrance leads to the center of the maze, which can later be verified by a spectator.

See also: Labyrinth magazine published by Fulves.