level: simple
......4.18..2........6.7......8...6..4....3...1.......6......2..5..1....7...3.... | initial |
265389471874251693193647852327894165946125387518763249631578924452916738789432516 | solved |
level: simple
Top 95 Sudokus 067 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt