% minesweeper 90 by Connect4, http://www.janko.at/Raetsel/Minesweeper/090.a.htm
minesweeper
very hard
15 15
..1.2..x.1.....
.1.3.21x...2.2.
.1.....x..11..1
..1..2.x2...1..
2..22..x..3...2
.2.2..2x1..12..
.....1.x..2...1
xxxxxxx2xxxxxxx
...1...x...2...
1.3.2.2x.3...1.
.......x1..2..3
.3...2.x.1..4..
..2.1.1x1..3...
.2.2.1.x.3...2.
..2....x.......
mines 41
