Printable Hard Sudoku

Set hva0z1. 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
1
8 6 9 2
5 2 4 8 7
7 5 2 3
4 8 1 5
9 1 7
9 6 5
9 4
4 8 9
Hard #2
9 7 5
5 2 9
8 6 2 4
7 1 8 3
6 2
4 7 8 9
8 4 1
4 9 5
7 2 3
Hard #3
5 9 7 1
9 7 8
6 3 2
8 6 2 7 3 1
8
4 9
7 3 1 2
8 4 2 9
7 5
Hard #4
1 5 9 6
9 6 7 1 4
6 1 2
3 7
1 2 4 8
9 5 6 1 4
3 7 5
2 5 7
Hard #5
3 8
7 6 2 3 5
6 5 4
2 8 4
6 5
4 9 6 3 8
9 1 7 4
4 2
8 9 1
Hard #6
5 9 7 4 3 2
1 3 6 7
9 1
7 6 5
4 8 3 9
3 4 1 7
1 9
4 8
8 7
Hard #7
2 7 5
6 2
9 7 4 3 1
2 8 3
6 1 9 4
4 5 3 7
4 5
6 2 9
1 7 3
Hard #8
1 8 2 5
5 9 3
6 7
3 7
8 4 3 6
7 5 1 8 6
2 6 1
3 1 5
2 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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