Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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