Langer's Sudoku Assistant

Invalid Sudoku!

Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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