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Step by step example of solving a sudoku puzzle
Step 20  

Another simple sudoku step. Let’s look at the top middle box (where ABC cross MNO0. The only cell left is BN and the only number left is 8.

 
J K L M N O P Q R
A
B
C
D
E
F
G
H
I
5 4 2
    9
6   1
1 9 7
4 Step20: 8 6
2 5 3
3 6 8
1 5 2
4 9 7
2 6  
1 5  
     
7   9
  2  
5   4
  8  
9 3  
2 7  
    5
    8
  1 6
     
3 4  
9 7  
    9
     
8   3



   
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