harvey/sys/games/lib/sudoku/boards/hard-2005-03-13.su

...4..2.7
...1.3.4.
6.....5.1
..82.71.6
.........
2.53.97..
8.4.....2
.2.7.4...
7.3..5...
381456297
592173648
647982531
938247156
476518923
215369784
854691372
129734865
763825419