level: simple
4.....8.5.3..........7......2.....6.....5.4......1.......6.3.7.5..2.....1.9...... | initial |
417369825638125947952748316825437169791856432346912758284693571573281694169574283 | solved |
level: simple
Top 95 Sudokus 023 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt