% nurikabe 657 by Tom Collyer, http://www.janko.at/Raetsel/Nurikabe/657.a.htm
nurikabe
medium-
18 10
..5.............5.
.3.........8......
...3.........5..1.
........1.........
..2...........2...
......1....3......
.2.....2.......d..
...5......5...3...
..................
.3..5...3...3.....
