Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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