Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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