Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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