xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-04-09.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1..58.4.2.
2.....5..9
3.1....5.3
4...39.8..
52.8...7.1
6..9.81...
75.4....1.
87..6.....
9.8.5.39..
10965834127
11347125689
12812967543
13471392865
14238456791
15659781234
16594278316
17723619458
18186543972
19