% kuromasu 140 by Grant Fikes, http://www.janko.at/Raetsel/Kuromasu/140.a.htm
kuromasu
medium
17 17
..5....4....7....
.5..3..........3.
..........4.....3
..........6......
3.....7........5.
.........3.......
..42...7....2....
.....6....6.....5
........5........
3.....5....4.....
....6....4...77..
.......b.........
.6........4.....2
......3..........
3.....7..........
.6..........6..9.
....5....2....2..
