Langer's Sudoku Assistant

Invalid Sudoku!

Row 1 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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