Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 1 is invalid. The bottom left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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