xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-04-23.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1.3..47.8.
2.261..7..
34.......6
43..42....
5.4.7.3.5.
6....98..3
75.......8
8..8..437.
9.7.86..9.
10931647285
11826135749
12457289136
13385426917
14649713852
15712598463
16594371628
17268954371
18173862594
19