Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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