% kuromasu 12 by Warai Kamosika, http://www.janko.at/Raetsel/Kuromasu/012.a.htm
kuromasu
medium-
13 13
...4..7......
..7.6....44..
.c...b..5..7.
.8...9.6....3
..7.6...6..6.
...4.....38..
4...........6
..7b.....4...
.2..6...3.6..
3....4.7...4.
.a..b..g...3.
..79....4.2..
......7..7...
