Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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