level: simple
6.....8.3.4.7.................5.4.7.3..2.....1.6.......2.....5.....8.6......1.... | initial |
617459823248736915539128467982564371374291586156873294823647159791385642465912738 | solved |
level: simple
Top 95 Sudokus 003 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt