level: simple
.98.1....2......6.............3.2.5..84.........6.........4.8.93..5...........1.. | initial |
498716523257839461136425987971382654684157392523694718765241839319578246842963175 | solved |
level: simple
Top 95 Sudokus 021 [sudoku:top95] “95 Hard Puzzles”, http://magictour.free.fr/top95, or http://norvig.com/top95.txt