Challenge Yourself

Can you identify the technique needed to make the next move before filling in any digit? Name it, then use it.

Challenge Yourself
✓ Completed! 👍
5
9
3
8
1
4
9
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4
2
7
4
6
3
7
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1
6
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8
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7
Challenge Yourself

Can you identify the technique needed to make the next move before filling in any digit? Name it, then use it.

Challenge Yourself