Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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