Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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