Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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