% slitherlink 93 by Hirofumi Fujiwara, http://www.janko.at/Raetsel/Slitherlink/093.a.htm
slitherlink
very hard
20 15
320..1..21..1..1131.
2...32.1..11.1.....3
2..2...132.0..222..1
..3...3.31..311...0.
21..1....1..1...2.1.
.2.0.1.3...3.11..3..
32.1.22.231....31.13
...3.12..32.13..2.1.
....11..1.......0.2.
2.31.3...12..1..3.2.
01..0..12..132.2...1
.....10.2.2..1.....3
.2.3.3.30..13..113..
.3.22....311.3.1....
.3...0..1....1..3210
