Nurimisaki

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).