Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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