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
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.