Island of One
A clue of 1 is already a complete island — every cell touching it is sea.
How it works
- 1A clue of 1 is already a finished island — it's just that one cell, nothing more to add.
- 2Every cell touching it would merge into it, which isn't allowed — mark all four neighbors as sea.
- Sea
- Cells that establish the pattern
- Where the conclusion lands