Langer's Sudoku Assistant

Invalid Sudoku!

Column 1 is invalid. The top left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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