Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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