Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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