% nurikabe #2 by James Dow Allen in 2007, http://fabpedigree.com/nurikabe/nurik02.htm
nurikabe
extreme
15 15
5..............
.........5....4
..3............
.3.....4....5..
....3....5...4.
..1............
...............
....4.4........
..4.....1...1..
..........3....
...5.....3...4.
.3........1....
..7....7.....1.
...............
4.............1
