TOUR

Level 01 · Fewest Ways Out. Twenty-five cells, twenty-four leaps, and one play in four thousand finishes. The rule that finds them all is one nobody has ever proved.

1. 01The marker leaps like a knight: two cells one way and one the other.
2. 02Visit all twenty-five. No cell twice, and the cell behind you is closed.
3. 03Every cell you have not visited prints how many ways out of it are left.