Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. Go back and make a different choice.

 

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

 

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