% slitherlink 728 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/728.a.htm
slitherlink
hard-
16 12
2.12.....2..11..
.....32...3.12.1
.1031....2...2..
...222.301...0.3
.3...11..2.....1
.....2.....21..2
2..22.....2.....
3.....3..21...1.
2.1...121.321...
..0...2....2122.
1.33.3...31.....
..21..3.....21.2
