Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

2
7
9
4
       
    
    
6
       
       
 
3
1
       
    
    
6
3
9
2
1
       
    
    
2
4
3
6
9
1
4
8
3
       
    
    
9
6
       
    
    
3
1
7
9
4
2
5
6
8
2
9
5
1
8
6
4
3
7
6
4
8
7
5
3
1
2
9
6
2
3
       
       
 
       
       
 
5
1
9
4
7
4
9
3
1
2
6
5
8
5
8
1
4
9
6
3
7
2

 

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