Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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