Printable Hard Sudoku

Set 1xnmyf2. 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 3 1 7
4 7
8 5 4 2
5 2
9 6 3
5 1 2 6
8 3
7 9 5 8
5 8 3 4
Hard #2
9 2 1 5 7
4 2 9
7 1
8
7 1 6 2
3 6 2 4 5
8 9
2 4 9
1 4 2 8
Hard #3
5 7 9
6 7 1
8 4
3 7 1 5
6 9 4
5 1 2 3
9 3
2 9 7 4 1
8 9 2
Hard #4
6 9 8
8 2 5
4 8
4 7 1 2
2 8 6
2 3
7 9 1 8 3
2 5 6
4 5 6 1
Hard #5
5 1 8 4 7
7 4 8 9
3 2 5
8 1 5
3 4 5 2
6 3 7 4
2
9 7
4 3 6
Hard #6
9 8 3 5
6 3 7 9
1 6
6 1 4 5
8 6
4 6 5 8 7
7 9 3
5
8 5 3 7
Hard #7
2 1 9
7
6 7 9 3
5 8 3 4
7 3
2 4 8
6 4 8
8 5 9 2 6 4
9 3 8
Hard #8
7 5 6 3
9 4 6 8 2 7
9
2 5 9 6
9 7 8
6 5 4 1
6 9
9 5
8 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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