Plan 9 from Bell Labs’s /usr/web/sources/plan9/sys/games/lib/sudoku/boards/easy-2005-01-29.su
...56..18 9.....52. ..5..149. 1.4.3.... .7..4..6. ....9.7.3 .516..8.. .29.....4 78..14... 247569318 916483527 835271496 194736285 372845961 568192743 451627839 629358174 783914652
