Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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