Langer's Sudoku Assistant

Invalid Sudoku!

Column 9 is invalid. Go back and make a different choice.

 

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

 

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