Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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