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