% nurikabe 589 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/589.a.htm
nurikabe
medium
18 12
...6........2.2.2.
2.......3.3.......
..1...............
....3.....2..4..4.
..3......2.......3
4...3.............
........2..3..2...
2.1.3........1....
........2.....1..3
..3..2......3.....
2.................
....3....3..3...3.
