harvey/sys/games/lib/sudoku/boards/hard-2005-04-07.su

.7.6.5...
5..14.9.6
..4.....2
4.....397
.........
732.....4
2.....6..
1.6.38..5
...5.1.2.
973625148
528147936
614389752
461852397
859473261
732916584
285794613
196238475
347561829