Challenge Yourself

Before using pencil marks, see how far you can get with pure logic and mental candidate tracking.

Challenge Yourself
✓ Completed! 👍
4
7
6
2
1
5
1
6
2
9
7
6
4
3
4
2
7
6
1
9
8
4
5
5
1
8
7
3
4
2
3
9
8
2
6
5
1
5
2
9
4
3
8
7
Challenge Yourself

Before using pencil marks, see how far you can get with pure logic and mental candidate tracking.

Challenge Yourself