Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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