Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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