% nurikabe 580 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/580.a.htm
nurikabe
medium
18 12
..1.2..2..3.......
.2..........3...2.
....2...3....3....
................2.
.2...2.3.2.2..3...
...3.............2
..........2.1.....
.....2........2...
.3.....1.2..1...2.
.....2........2..3
.2........3.......
....2..2......2...
