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Step by step example of solving a sudoku puzzle

Step 31   This step is most fun part of the sudoku game. Don’t you love it where there’s only one cell left blank. You already found 8 numbers in the box and according to the sudoku rules you can’t place a number twice in the same box. Let’s look at the top left box (where ABC cross JKL). The only blank cell is BK and the only remaining number is 3.

 
J K L M N O P Q R
A
B
C
D
E
F
G
H
I
5 4 2
7 Step31: 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  
1 5  
8 9  
7   9
  2  
5   4
5 8  
9 3  
2 7  
    5
9 7 8
  1 6
     
3 4  
9 7  
7   9
6   5
8   3



   
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