Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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