% nurikabe 641 by Tom Collyer, http://www.janko.at/Raetsel/Nurikabe/641.a.htm
nurikabe
easy+
10 10
.4.1......
..........
..1..3.2..
......1..3
.....4.5..
..........
.3.2......
..1.......
.4.5......
.........2
