% nurikabe 549 by Adolfo Zanellati, http://www.janko.at/Raetsel/Nurikabe/549.a.htm
nurikabe
hard
16 12
4..2...2.....2..
..3........4....
.....2...4.....3
............3...
.2.............3
....3.4.....2...
2.......2.1..4..
..2.2.2.........
.........3..2...
.2..............
1....3..2....2.3
..2......3......
