Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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