PlaySudoku.us
Hard · Puzzle #628
4
3
4
7
6
8
9
8
6
3
2
6
9
3
4
7
3
1
2
2
5
3
9
1
7
5
3
"He who learns but does not think is lost. He who thinks but does not learn is in great danger." — Confucius
"He who learns but does not think is lost. He who thinks but does not learn is in great danger." — Confucius
"A mathematician is a device for turning coffee into theorems." — Paul Erdős
"A mathematician is a device for turning coffee into theorems." — Paul Erdős