% slitherlink 529 by Otto Janko, http://www.janko.at/Raetsel/Slitherlink/529.a.htm
slitherlink
very hard
36 20
.2.3.....3.....3.20..13...0..1..33.3
3..3.33..21.31..2..21...23..2..2..1.
3.1....1...3....31...3.....10.23.1.3
....022.33..21........20..3.2...2..2
03..3..3....3.30...33.3..2.1.1...03.
...2.0...3....3..33.......3.3.3..2..
..0..2..13.1..11.2.1.03...1..0.120..
03..3.......10...3.3...0.1.1.3.3...1
2..11.30..323.21..2.22..3.3.....2.3.
3..3..3..1....0.1.2.2.3.2..03.22..3.
.3..12.22..3.3.3.2.3.3....3..2..3..2
.1.2.....3.2..10.0..22.012..12.03..2
0...2.3.2.2.3...3.3...31.......3..20
..230.1..3...13.1.2.02..2.31..1..3..
..0..3.3.1.......32..2....1...2.0...
.32...1.3.3..2.32...10.3....3..2..33
2..3...1.2..13........31..20.333....
2.2.23.33.....0...30....1...1....0.2
.1..3..0..31...32..2..03.13..33.3..1
1.20..3..3...33..21.1.....3.....0.3.
