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Easy · Puzzle #994
4
5
8
2
9
3
7
9
5
4
8
9
3
6
8
6
9
1
3
1
2
9
3
6
4
1
5
8
1
6
3
5
5
8
3
4
2
9
6
5
7
1
3
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.