Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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