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