Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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