Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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