Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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