ref: 2f01287c83dec1310f6421e5ae4bae9e97440f4f
dir: /sys/games/lib/sudoku/boards/easy002.su/
......... ..98.51.. .519.742. 29.4.1.65 ......... 14.5.8.93 .267.958. ..51.36.. ......... 782614359 439825176 651937428 293471865 568392714 147568293 326749581 975183642 814256937