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