Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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