PlaySudoku.us
Hard · Puzzle #309
4
6
9
7
1
2
5
1
2
4
3
5
7
8
4
8
3
1
2
5
9
8
3
9
4
8
5
8
1
"In mathematics, the art of proposing a question must be held of higher value than solving it." — Georg Cantor
"In mathematics, the art of proposing a question must be held of higher value than solving it." — Georg Cantor
"In mathematics, the art of proposing a question must be held of higher value than solving it." — Georg Cantor
"In mathematics, the art of proposing a question must be held of higher value than solving it." — Georg Cantor