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! 👍
8
1
8
3
6
1
5
2
7
3
8
5
7
9
4
2
7
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9
5
3
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