Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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