Nurimisaki is a Nikoli logic puzzle.
- Shade some cells in the grid.
- All unshaded cells must be connected.
- No 2×2 square may be fully shaded.
- No 2×2 square may be fully unshaded.
- Cells with a circle in them may not be shaded, and must form a dead end (only one adjacent direction should be unshaded).
- Cells without a circle in them which are not shaded must not form a dead end (i.e. at least two neighbors should be unshaded).