Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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