Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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