PlaySudoku.us
Hard · Puzzle #877
9
7
3
8
5
8
6
5
6
1
6
4
9
9
7
6
3
8
1
4
6
9
5
6
2
7
3
Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.
Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.
Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.
Work the most constrained areas first — rows, columns, or boxes that already have the most filled digits.