Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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