% nurikabe 416 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/416.a.htm
nurikabe
medium
15 10
....3..2..3....
........2......
3..........3...
......4.......4
........2.3....
3..3..........2
.........3..4..
....3.3...1...2
3..............
..2...2.3......
