% slitherlink 740 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/740.a.htm
slitherlink
hard-
16 12
.3.2.22.13.2..1.
.2.....10..1..31
13..2.3...13....
3..32..11....3..
3.3.21.......0.1
.........3..23.1
2.23..0.........
2.2.......23.1.2
..2....31..31..2
....21...2.2..23
30..3..11.....2.
.2..3.10.22.3.0.
