Play Medium Sudoku Online

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