PlaySudoku.us
Medium · Puzzle #600
6
4
1
8
2
5
3
1
9
7
3
7
5
6
4
8
1
2
2
4
7
2
3
4
6
2
1
5
5
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.