xref: /plan9-contrib/sys/games/lib/sudoku/boards/hard-2005-05-23.su (revision a8e650f8b6804428114023f948a3fb1a4d7b82d3) 
1....185.9
2..54.....
3..4.69.27
474.......
5.1.....5.
6.......86
757.68.4..
8.....76..
98.319....
10627318549
11985472163
12134569827
13746835912
14318926754
15259741386
16572683491
17491257638
18863194275
19