% slitherlink 419 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/419.a.htm
slitherlink
medium-
10 10
.3....232.
1..12.....
12..32.2..
.2.12.2111
...3.3..2.
.2....2.2.
3.3233.2..
3.2...312.
...2...2.2
32.322....
