% kuromasu 178 by Otto Janko, http://www.janko.at/Raetsel/Kuromasu/178.a.htm
kuromasu
medium
13 13
6...2.2.2..4.
.....f.......
...6.3.8..7.6
......gk.....
.a9.6.a.9..b.
.......k.....
...9.....7.5.
.....4.......
...6....8.6.3
5.5..46..6...
.............
.a.....b...6.
2...5..8.6...
