Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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