Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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