shithub: riscv

ref: 52ad5b3ec5138a85e4c976013adbc54642f19b74
dir: /sys/games/lib/sudoku/boards/easy-2005-03-29.su/

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.6..9....
..74.....
9.4...7.8
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1.57.46.9
3...6.57.
8.3...9.2
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914256738
476589123
125734689
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