Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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