Langer's Sudoku Assistant

Invalid Sudoku!

Row 7 is invalid. Column 5 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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