% nurikabe 175 by ooya, http://www.janko.at/Raetsel/Nurikabe/175.a.htm
nurikabe
medium-
18 10
..3....5....2.....
.........2....2...
.1....4....1......
........3....3....
7....5....2.......
.......5....4....7
....4....1........
......2....3....6.
...1....2.........
.....2....1....4..
