% slitherlink 670 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/670.a.htm
slitherlink
unknown
36 20
.2...1..333...3122.23....2.32.......
31.321.02...2.....2032...23111..2..3
...1....22.3..21.....2......3...2.23
.12.23.11...2...3..3...3.....2112.2.
33..2.22.1.2...12........33....3.132
2.3.....3.3.3..2202.131....2.0..2.3.
22..212.3..2...032...3........3..222
.321.3...122...1....2..3.11.1.1.12.2
1...3..2.33121.3......322.3...22..23
..122.3......2..13...1..3.1212.2.2.2
2..12121.3.2.......1..23.2.2..22.123
.23........1.02..2312.......111...3.
..221..20..3..3....3222..2.133..31.3
3.32.22..3....221.21.2.12123....13..
2.21213.31..2.31...2.01...1.2......3
2.2..22..122.....3.1.2..21.2.13..13.
....21.33....3......2.22.23.332.21.2
32.2...2..23..2.....2.23.2...12...32
.1.3.....1.3.3.2212.2.12...23....2..
.33...23.3...2..2.22.3......232.2.13
