PlaySudoku.us
Hard · Puzzle #561
4
2
7
6
6
6
4
3
2
9
1
7
4
6
9
1
4
8
7
4
5
3
1
3
7
4
9
"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