level: simple
4...7.1....19.46.5.....1......7....2..2.3....847..6....14...8.6.2....3..6...9.... | initial |
496573128381924675275861943153789462962435781847216539714352896529648317638197254 | solved |
level: simple
Top 95 Sudokus 078 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt