PlaySudoku.us
Medium · Puzzle #204
5
8
9
1
6
2
8
3
6
7
7
1
8
6
4
9
1
7
9
6
9
4
8
7
4
7
8
4
2
9
8
4
5
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.