Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 4 is invalid. Go back and make a different choice.

 

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

 

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