shithub: riscv

ref: c6ad540af56be95b458008ae3abd3432b71d49dd
dir: /sys/games/lib/sudoku/boards/medium-2005-02-27.su/

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9..6.....
.467...2.
7.8.3....
8.3....5.
..93.47..
.1....6.8
....4.8.1
.7...639.
.....9..6
932651487
146798523
758432169
823167954
569384712
417925638
695243871
274816395
381579246