% nurikabe #5 by James Dow Allen in 2007, http://fabpedigree.com/nurikabe/nurik05.htm
nurikabe
very hard
13 13
......6......
.5........1..
..3......3..3
2.........4..
.............
.2.4........1
.....9.4.....
........1....
..4......1...
....1......3.
4.....6......
...3.........
.......2....2
