Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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