Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 9 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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