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Step by step example of solving a sudoku puzzle
Step 40   Let’s look at the middle box (where DEF cross MNO). This is the prize for your hard sudoku work. After all the main power invested in finding the other 8 numbers in the sudoku box, you are left with the obvious choice. The only cell left in this box is EO and the only number missing is 8.

 
J K L M N O P Q R
A
B
C
D
E
F
G
H
I
5 4 2
7 3 9
6 8 1
1 9 7
4 8 6
2 5 3
3 6 8
1 5 2
4 9 7
2 6 4
1 5  
8 9  
7 3 9
6 2 Step40: 8
5 1 4
5 8 1
9 3 4
2 7 6
  2 5
9 7 8
  1 6
     
3 4  
9 7  
7   9
6   5
8   3



   
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