Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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