Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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