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.

 

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

 

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