Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Go back and make a different choice.

 

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

 

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