Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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