xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-03-13.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1...4..2.7
2...1.3.4.
36.....5.1
4..82.71.6
5.........
62.53.97..
78.4.....2
8.2.7.4...
97.3..5...
10381456297
11592173648
12647982531
13938247156
14476518923
15215369784
16854691372
17129734865
18763825419
19