% slitherlink 590 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/590.a.htm
slitherlink
hard-
19 16
.1..3.202........2.
222..2.3.1.221...22
2.23...2.....21..22
.2.2.3...2....2...1
.2.....3..2..13..2.
.2..23.3031.21..3.3
...22.12..2..3.2..3
.2.....2......12322
.22212.0.0..322.1..
3.2.2..23.3.2...2.2
.....122.2.3....1..
233..2.2..2....3...
......12.3.33121.02
222.21222.22..2.32.
232...2......32..22
2.2..2.33.3........
