Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 6 is invalid. The top center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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