level: simple
2....1.9..1..3.7..9..8...2.......85..6.4.........7...3.2.3...6....5.....1.9...2.5 | initial |
283741596615239748974865321397126854861453972452978613528394167736512489149687235 | solved |
level: simple
Top 95 Sudokus 063 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt