level: simple
1....786...7..8.1.8..2....9........24...1......9..5...6.8..........5.9.......93.4 | initial |
124597863937648215856231749513786492482913657769425138698374521341852976275169384 | solved |
level: simple
Top 95 Sudokus 057 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt