Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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