Langer's Sudoku Assistant

Invalid Sudoku!

Column 3 is invalid. Go back and make a different choice.

 

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

 

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