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