% slitherlink 88 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/088.a.htm
slitherlink
very hard
20 15
.1113.2.1.33.2.222.1
3...1.20...1.011.13.
..2....2.3......3...
.1...11.2..2...3.2.3
1.31..2..33.23.2...1
.2..3..11.2....2....
..1...1..1...12.2..2
.2.1.31...3.11.1313.
.......13.2.3....13.
13.1.31.....2.31.21.
...3.2.11..131.0.3..
.0..0..320....1....2
...1.1.....0.13132..
1.2.3..012..3....2.2
3.2..0...1..11.2...1
