Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. Go back and make a different choice.

 

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

 

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