Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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