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