Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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