Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/games/lib/sudoku/boards/vhard-2005-04-16.su
.8....3.1 ..9.2..4. 7.......5 ..7.36.9. ......... .9.75.4.. 1.......2 .5..6.8.. 3.4....6. 486579321 539821647 721643985 217436598 645918273 893752416 168394752 952167834 374285169
