Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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