% nurikabe 610 by Toonkigou, http://www.janko.at/Raetsel/Nurikabe/610.a.htm
nurikabe
medium-
17 17
......3....4..4.2
.....3....4......
2.2..............
.2....4..........
...1.2.4........2
............2.3..
...2.......2....1
........3........
.......3...4....3
.4.3.............
5......6.......5.
..............2..
.....4.1...5.....
.2..2.3..1.......
3................
.............3..5
....4.6..........
