Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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