Langer's Sudoku Assistant

Invalid Sudoku!

Column 1 is invalid. Go back and make a different choice.

 

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

 

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