Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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