level: simple
......8.16..2........7.5......6...2..1....3...8.......2......7..3..8....5...4.... | initial |
723469851651238794894715632375691428912874365486523917248356179137982546569147283 | solved |
level: simple
Top 95 Sudokus 042 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt