level: simple
......8.17..2........5.6......7...5..1....3...8.......5......2..4..8....6...3.... | initial |
254379861761248593893516742326791458915824376487653219538167924142985637679432185 | solved |
level: simple
Top 95 Sudokus 030 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt