% slitherlink 606 by Luke Pebody, http://www.janko.at/Raetsel/Slitherlink/606.a.htm
slitherlink
very hard
19 16
2.2.3.3.33..2.22.2.
.22.....12...21...3
2.312.2...2.2......
.22....2.213.2122.3
23.2.2...1..12.22..
211.3.2333..2.1.2.2
2......2...3......2
....23..2.2.2...13.
...2.32......202..2
3......32.322..323.
323.2......2.1...2.
1.12.1...1222331...
2...323..222.12.3..
.11.22.21..3...2..1
...3.3...3121..12..
.213.2.......3.3.13
