Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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