% nurikabe 309 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/309.a.htm
nurikabe
medium
10 10
2.........
.....9....
...2....2.
..3.......
2.....9..2
..........
....3....2
3.........
...6......
....3.....
