PlaySudoku.us
Hard · Puzzle #810
9
3
2
1
6
8
2
3
6
7
9
3
4
8
8
5
9
7
2
1
8
5
4
6
5
7
Complete a Medium puzzle using only box-based logic — no row or column scanning allowed.
Complete a Medium puzzle using only box-based logic — no row or column scanning allowed.
"Mathematicians do not study objects, but relations between objects." — Henri Poincaré
"Mathematicians do not study objects, but relations between objects." — Henri Poincaré