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.

 

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

 

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