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