shithub: riscv

ref: 4a916ba86e700d5e99311b45a81dc7be8a50b843
dir: /sys/games/lib/sudoku/boards/easy-2005-02-06.su/

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86.....9.
...6..8.7
2.3.....4
....15.3.
3.78245.9
.5.39....
9.....3.8
7.5..8...
.8.....75
861457293
549632817
273189654
698715432
317824569
452396781
926571348
735948126
184263975