shithub: riscv

ref: 31c5c1ac9a99ac12c395882e25aec3d7d98de016
dir: /sys/games/lib/sudoku/boards/hard-2005-05-01.su/

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.362..17.
9.....2..
...8.5...
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3.4.7....
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..8.....7
.49..832.
836249175
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472815693
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657192834
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