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Expert · Puzzle #789
5
4
6
7
8
1
2
8
1
1
6
7
8
1
2
6
1
4
3
8
4
5
7
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.