Hard sudoku — printable sheet 10
Four hard puzzles, one page. Answer key: view answers.
4
7
6
1
9
6
9
8
1
5
6
3
7
4
2
5
7
8
3
9
5
4
1
8
9
3
3
4
7
6
8
3
8
4
3
5
9
4
6
2
9
6
1
9
7
8
2
7
4
1
2
5
1
3
3
9
4
8
1
1
9
8
2
4
5
8
6
3
5
4
9
7
1
4
6
4
3
7
2
8
6
2
1
2
9
5
4
6
2
4
8
9
9
7
1
3
6
2
9
4
3
9
8
Sheet 10 of 20 · all hard sheets