Printable Hard Sudoku

Set p7nebn. 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 4 8 7
2 9
4 6 5
8 4 1 7 6
2
4 5 1
5 9 1 8
8 7 6 5
1 5 2
Hard #2
7 9 5 1
7 8 2 9
1 4 5
1 2 3 9
3 9 8 6
7 5
1 4
2 4 8
2 7 6
Hard #3
5 9
1 3
6 3 8 2
6 8 9 1
4
5 2 1 8 6
8 1
9 5 7 4
7 9 4 8 5
Hard #4
8 3 7 9
7 2 9 4 1
8
2 8
5 1 6 2 3
3 6 7 1 8
9
1 6
6 3 1 4
Hard #5
6 7 4 2
9 6 1
1 8 2 4
1 3 5
7 4 9 8
4 6 5
7 5 2
9 7 3
5 7
Hard #6
6 4 3 2
9 2 3 4 8 1
2 6
2 1 3 7 8
6 3
2 1 5
3 1 5
2 9
7 1
Hard #7
2 5 8
3
1 6 9 7 3 4 5
6 8
4 3 8 9
1 2 7
6 8
5 9 7 6
7 4 2
Hard #8
3 5 6 7
5 4 8
4 6
7 5 2
6 9 8
6 4 1
8 5 9 3
1 8 4
2 9 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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