How to play
- Shade cells to make the sea. Each number sits in an island of unshaded cells that size.
- Every island has exactly one number.
- The sea is one piece, joined side to side, with no 2×2 block.
- Tap a cell to shade it, again for a dot that marks island, again to clear. Drag to paint.
Keyboard: arrows move, space cycles, S shades, D marks a dot, Delete clears, Shift + arrow carries a mark along. Undo is Ctrl + Z, redo Ctrl + Shift + Z (⌘ on a Mac).
Learn how to solve it