Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 8 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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