Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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