Printable Hard Sudoku

Set x24tip. 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 1 7
8 9 1
4 2 5
9 4 6
2 1 7 4 8
4 5 9 7
7 3 9 4
1 2
8 5
Hard #2
7 8 4
1 5 7
4 9 3 2
2 1
5 9 6
5 7 6 2
1 6 9 8 5 3
5 4
1 6
Hard #3
2 4 5 7
9 3 2
6 9 5
4 5 7 9
7
6 9 4 3 2 5
7 2 3 1
9
4 6 2
Hard #4
7 5 4
7 6
6 5 2 8
8 2 5 9 7
3 6 4
7 4 3 5
8
7 3 5
4 1 2 9
Hard #5
9 1 2 3
6 5 1
5 4
5
3 4 5 7
5 8 1 9
2 1 4
5 8 9 1 3
3 7 8
Hard #6
3
6 8 7
9 6 3
8 1 5 6 7
1 2 5
5 4 8
7 5 9 2 3
6
5 8 9 4 6
Hard #7
6 5 9
2 6 7
3 5 8
6 7 5 8
8 9 1 4 3
6 2 1
7 5 8 6
9 1 4 3
Hard #8
9 6 2 4
4 5
2 9 8
6 8 1
5 1 4 3 2
3 6 9 4
8 3 7 5
5
7 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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