% slitherlink 547 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/547.a.htm
slitherlink
easy+
10 10
.2.1..321.
3....3...1
3.31...0..
2....1.1.0
.1.320....
....311.3.
3.0.3....0
..1...20.2
0...2....2
.313..2.3.
