Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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