Step by step example of solving a sudoku puzzle
Step 9
Let’s look at box in the bottom right of the sudoku web (where GHI cross JKL). We can’t put 6s in columns J and K because there are 6s in columns CJ and DK. Therefore 6 must be in cell IL.
J
K
L
M
N
O
P
Q
R
A
B
C
D
E
F
G
H
I
5
2
9
6
1
9
7
4
6
3
5
9
7
2
6
1
5
7
9
2
5
4
8
9
3
2
7
5
8
1
Step9: 6
3
4
9
7
9
8
3
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