Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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