PlaySudoku.us
Medium · Puzzle #60
2
2
1
7
8
7
5
1
3
6
4
3
1
8
6
9
7
1
8
5
3
9
3
1
6
6
1
9
2
7
4
7
8
2
4
3
9
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.