Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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