PlaySudoku.us
Hard · Puzzle #219
8
6
2
9
3
1
7
3
9
2
2
8
6
5
4
7
2
8
4
6
6
7
9
7
6
2
1
3
4
"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