Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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