PlaySudoku.us
Hard · Puzzle #778
2
1
8
3
2
5
9
8
9
6
9
7
2
7
2
6
4
2
8
5
4
1
2
6
4
2
8
3
"The only way to learn mathematics is to do mathematics." — Paul Halmos
"The only way to learn mathematics is to do mathematics." — Paul Halmos
"Thinking is the talking of the soul with itself." — Plato
"Thinking is the talking of the soul with itself." — Plato