Hard sudoku — printable sheet 17
Four hard puzzles, one page. Answer key: view answers.
6
2
1
7
9
7
6
9
2
4
2
5
7
4
8
9
4
1
5
8
5
3
2
6
7
3
9
4
5
2
9
1
6
3
7
2
8
4
9
4
8
1
4
7
9
3
6
1
2
3
8
5
7
3
2
6
1
3
8
7
6
2
9
5
1
2
9
4
8
7
6
2
9
3
5
1
8
7
4
5
7
2
6
3
8
9
3
6
1
6
4
8
9
1
6
4
2
7
2
8
5
6
Sheet 17 of 20 · all hard sheets