A maze is a tour puzzle in the form of a complex branching passage through which the solver must find a route. The pathways and walls in a maze are fixed, and puzzles in which the walls and paths can change during the game are also categorised as tour puzzles. The Cretan labyrinth is the oldest known maze.Technically the maze is distinguished from the labyrinth, which has a single through-route with twists and turns but without branches, and is not designed to be as difficult to navigate.