Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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