Aquapelago is a logic puzzle genre created by Walker Anderson.
- Shade some cells on the grid.
- Some shaded cells may be given.
- No two shaded cells may be directly adjacent.
- All unshaded cells must be connected.
- No 2×2 square can be fully unshaded.
- If a shaded cell has a number in it, the number of shaded cells in the group of diagonally connected shaded cells must be that number.