% slitherlink 223 by Oleg Andrushko, http://www.janko.at/Raetsel/Slitherlink/223.a.htm
slitherlink
very hard
36 20
.1..1.1.3...12...21...11...1.3.1..0.
3.20.3.3.1.3..0.2..1.3..3.3.0.2.31.3
.1........2...3.1..3.1...3........3.
0...213..2...2..3..0..1...2..333...2
.3.1...0.3..2..3....3..1..3.1...1.3.
2...1..2..22..2..30..3..30..1..3...1
.3...1.0.....0..2..2..1.....1.2...3.
..13..3..12..2..3..2..3..12..0..31..
.3..2...1..3..3..21..1..1..0...2..1.
.1...0..3...3..2....1..3...2..0...3.
.3...3..1...3..2....3..3...0..1...1.
.3..2...3..0..3..20..2..0..3...3..3.
..20..3..31..0..1..1..1..20..3..02..
.3...2.1.....3..0..1..2.....1.3...2.
2...0..1..23..2..10..2..02..0..1...1
.1.3...3.3..2..2....2..3..1.3...1.1.
0...213..0...2..1..3..3...2..110...2
.3........1...1.2..1.0...1........3.
2.22.3.3.3.3..1.1..2.2..3.3.0.3.20.2
.3..2.2.0...13...02...22...3.3.1..3.
