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.

 

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

 

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