If you think about it, even difficult mazes on paper are pretty easy. You can see all the places you can and can’t go, and if you use a pencil instead of a pen, well, that’s almost like cheating.

Mazes and labyrinths have been a popular source of fun since the Middle Ages, when nearly 25% of cathedrals had a labyrinth in their grounds. Completing a maze is more of a puzzle solving exercise ...