PlaySudoku.us
Medium · Puzzle #303
4
8
5
7
2
7
4
8
5
6
9
7
3
9
6
6
4
5
3
8
9
6
3
2
3
8
6
3
1
9
1
8
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.