xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-05-22.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1..6..2...
2....5.4.2
3.7.49..1.
47.4..92..
51.......8
6..91..5.3
7.1..46.5.
86.5.7....
9...5..3..
10546312897
11981657432
12273498615
13754839261
14132765948
15869124573
16318246759
17625973184
18497581326
19