shithub: riscv

ref: 7a8e875668d92020548d07b5ad30f7b83b61d1fc
dir: /sys/games/lib/sudoku/boards/easy-2005-02-11.su/

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.6.....8.
..25.....
.7..864.2
68...21..
..73.58..
..54...63
3.864..5.
.....13..
.5.....9.
164239587
832574916
579186432
683792145
417365829
925418763
398647251
246951378
751823694