Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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