xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-04-08.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1....7....
2.6.8.4.3.
38.....62.
4...2.1..7
51.3...8.5
69..5.8...
7.94.....6
8.5.1.9.8.
9....4....
10439672518
11562814739
12871953624
13685291347
14123467895
15947538261
16294385176
17756129483
18318746952
19