Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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