xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-03-26.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1..8..457.
2.........
3.1..726.3
4.....8.1.
5.62.1.84.
6.8.5.....
75.169..3.
8.........
9.498..7..
10238164579
11796385124
12415972683
13957248316
14362719845
15184536297
16521697438
17873451962
18649823751
19