Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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