Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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