A maze is a rectangular arrangement of blocks $($walls$)$ and open spaces $($paths$).$ A maze may have a path

through it from a given start location to a given end location. You can usually move only one cell at a time.

From each cell you choose your next move. Moves can only be into unblocked cells. In a restricted maze

$($which we are describing here$)$ you can not cross your existing path: i$.$e$.,$ once you visit a particular cell, you

can$$t visit it again $($for all intents and purposes, a visited cell is blocked to future attempts to move$)$