Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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