Colour Basin

How to play

Your basin starts in the top-left corner. Choose a new colour to recolour the whole connected basin. Touching squares of that colour join it.

Fill the whole board within the move limit. Squares connect along edges, never corners. Changing colour costs one move, even when no new squares join.

Undo as often as you like. If you run out of moves, undo or restart to try a different route. There is no timer. Some puzzles allow one or two spare moves beyond a shortest route; others ask for a shortest route.

Each colour has its own symbol. Use the colour buttons, or press 1–4. U undoes a move. A held key does not repeat.

Attempts and your fewest-move completions stay in this browser when saving is available. They do not sync across devices. Clearing site data removes them.

Restart this puzzle?

Start this board again. Your completed record stays saved.