Every frog hops three times: on Monday, on Tuesday and on Wednesday.

A hop goes straight up, down, left or right and always ends two squares away: the frog hops over the square beside it and lands just beyond it.

A frog may hop only over water or a stone, never over a lily pad or over any frog’s starting square.

On Monday and Tuesday a frog lands on water, and on Wednesday on a lily pad. Exactly one frog lands on each lily pad.

Every stone must be hopped over exactly once. No frog may land on a stone.

No square is used twice, not even on another day or after the frog has left it: not to start from, to land on or to hop over.

Tap a frog, then the square it should hop to. Tapping a square the chosen frog has landed on takes back that hop and every one after it.

With Crosses on, tapping a square puts a cross on it or takes it off. Crosses are your own notes; the game does not check them.

Learn the solving techniques