Printable Hard Sudoku

Set 1qq0odc. 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 7 1 5
8 5 9 7
3 9 6
6
4 1 6 2
7 1 9 4 6
3 1 9
1 7 8
4 6
Hard #2
6 9 5
7 5
3 2
8 4
4 1 5 6
2 4 7 9
3 8 7 9
8 3
1 4 3 8 6 7
Hard #3
5 3 7 8 1
9 8 1 4
3 2
8 6 3
9 4
4 8 9 2 5
7 1 6 3
3 5 7
8
Hard #4
3 7 5 1 6
6 9 2
4 1 8 7 5
3 1 6
5 8
9 4
6 1
4 8
1 2 5 6 3
Hard #5
6
6 2 7 3 9
3 9 5 4
1 5 6
2 9 7
8 9 4 2 1
7 4
3 1 6 8
4 3
Hard #6
2 9 5 6
5 4 2 3 7
3 4
6 7 5
8 4 9 5
9 4
9 5 6 2 1
3 2
8 5
Hard #7
6 1 7 5
9 1 4
3 7 8
1
3 5 9
8 9 4 7
9 2 7
4 2 7 5
7 8 1 3
Hard #8
1 3 8 7 2
5 1 3
9 7 8
7 6
3 1 5
5 4 2
4 3 7 2
2
8 7 5 6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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