Printable Hard Sudoku

Set 8w9naq. 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
5 4 3 9 8
9 3 6 1
7 9 2 6
1
2 8 6 4
7 5 9
5 2
3 6 1
7 6 3
Hard #2
7 4 5 6 9
3 1 8 2 7
8
5 9 1
3 6 2
5 1 2 3
3 8
9 2 6 1
4 8
Hard #3
3 6 2 4
6 9 1
2 8
6 7 5 2
4 5 7 2 6
2 1
9 8 5
4 7 1
8 6 3
Hard #4
8 7 3
4 1 5 9
5 8 7 3
7 5 9
2 4
2 8 3 6
3 5 9 4
6 8 3
7 5
Hard #5
4 6 5
1 3 9
8 3 9
5 4 2 3
3 2 8 1
8 7 4
4 7
4 7 5
7 6 9 1
Hard #6
9 3 1
2 7 6 1 3
6 2 5 4
2 1 3
6 4 8 9
3 5
1 4
5 8 6
8 4 5
Hard #7
3 6 9 1 4
8
6 8 3 2
5 3 1
2 4 8 5
6 8 4 2
4
3 2 1 7 8
7 9
Hard #8
1 3 4
9 3 2 5 1
5 4 1 6 9
9 5 6
1 6
3 8
6 4
2 3 8 5
5 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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