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