Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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