Langer's Sudoku Assistant

Invalid Sudoku!

Column 8 is invalid. Go back and make a different choice.

 

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

 

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