% kuromasu 31 by {unknown}, http://www.janko.at/Raetsel/Kuromasu/031.a.htm
kuromasu
hard-
17 17
.3.............3.
5..4.........8..4
.....a..4..3.....
.5.....3.3.....6.
......4...8......
..6....3.3....6..
....2.......2....
...6.5.....6.5...
..3...........8..
...6.2.....8.7...
....4.......5....
..3....5.5....8..
......4...4......
.3.....3.3.....5.
.....9..5..8.....
3..3.........6..2
.5.............2.
