Practice
X and V reps
Quiet board
Full grid
On your own
Where does the 9 go in box 2?
Place it.
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
V
V
V
V
V
V
V
V
X
X
X
X
X
X
X
X
X
X
X
X
5
4
9
7
8
7
3
1
9
6
2
2
6
1
3
6
8
Place 9
Check
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