% kuromasu 25 by Toshio Karino, http://www.janko.at/Raetsel/Kuromasu/025.a.htm
kuromasu
hard-
13 13
.........5.4.
3..3..2......
.3......5...6
...7..3......
4....5..5.4..
.8...........
...6..3..4...
...........5.
..4.6..6....5
......2..5...
4...8......5.
......2..4..2
.3.3.........
