Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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