% kuromasu 30 by {unknown}, http://www.janko.at/Raetsel/Kuromasu/030.a.htm
kuromasu
very hard
17 17
...8.....7....5..
..4..3......5....
......5..........
.2.........6....4
..2..5...5....4..
....5............
6.......2....5...
.8....3....5....3
.................
3....6....9....5.
...4....6.......4
............4....
..3....2...2..5..
6....3.........3.
..........4......
....3......5..3..
..5....2.....4...
