PlaySudoku.us
Medium · Puzzle #141
7
3
2
1
6
5
7
4
8
1
6
4
9
3
8
7
6
9
1
5
2
6
8
8
7
4
1
8
3
7
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.