Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. Go back and make a different choice.

 

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

 

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