Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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