Printable Hard Sudoku

Today's set (2026-10-05). 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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