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.

 

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

 

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