Printable Hard Sudoku

Today's set (2026-10-06). 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
2 6 9 8
9 8 7 1 3
3 8 2 7
4 8 6
1
6 8 7 2 4
1 4
5 6 3
7 9
Hard #2
5 4 6 2 1
8 7 4 5
9 7
2 5 6
7 4 3
1 6 8 2
7
9 7 2 3
2 5 9
Hard #3
2 6 4 7 1
7 4 6 2
5 2 8
4
5 8 6
7 6 1
2 3 1 7 9
7 4
4 2 1
Hard #4
1 4
4 1 7 2 8
5 2 7
4 9 6 1 2
7
9 7 8 3
5
6 2 8 9
7 3 4 6
Hard #5
6 8 9 2
8 4
6 4 8 7 3 5
7
2 5
2 9 7 4 8
1
5 8 3
8 7 3 1 4
Hard #6
3 4
1 4 5
8 9 3
5 1 2 8 4
1 2 3 9
6 2 7
3 8 7
7 8 9
6 4 5
Hard #7
8
6 1 4
3 4 2 7 1
5 1 9 2
6 5 9
4 1 6
7 5 6
5 1 3 7 9
8 4
Hard #8
2 9 4 3
7 1 5
1 6
3 4 2 9 7 6
2 5
8 7 4
9 4 1 7
3 8
7 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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