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

 

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