Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 9 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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