Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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