xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-04-30.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
11.....5..
2.562.4...
3.2.1..3..
4.9..51..4
57.......5
68..32..1.
7..7..6.5.
8...5.216.
9..9.....3
10178963542
11356274891
12924185376
13692851734
14731649285
15845327619
16217436958
17483592167
18569718423
19