% slitherlink 503 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/503.a.htm
slitherlink
medium-
14 10
3..2..3.....3.
....2...2022..
3.3.113...1.3.
.1..3..213...1
3.302.22...2..
3.31..1.23221.
...1...12..322
.222...22..3.3
..2..02..1...2
.02.3....2.1..
