Langer's Sudoku Assistant

Invalid Sudoku!

Row 2 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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