Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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