Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. Go back and make a different choice.

 

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

 

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