Langer's Sudoku Assistant

Invalid Sudoku!

Row 3 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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