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.

 

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

 

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