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