Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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