Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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