Printable Hard Sudoku

Set p3rs9a. 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 6 7
5 6 3 8
1 7
7 8 1 3 2
3 5 4 6
4 3
5 2 1
3 1 4 5
8 3
Hard #2
6 1 4 2
9 2
7 9 3 4 6
5 3 8
7 9 3 2 6
7
4 7 3
2 8 6 7
2 4
Hard #3
5 1 2
6
9 2 6 1 4
9 3 4 8 5 2
5 7 6 3
1
4 6 2 1
1 4 3
9 7
Hard #4
5 2
6 3 8
5 1 4
4 8 1 2
7 6 8
3 9 1
8 3 2 1 4
7 4 8 3
4 5
Hard #5
7 9
8 4 1
5 3 9 8
4 2 3
1 5 6 9
7 5 8
9 8 1 3 4
6 4 7
6 8
Hard #6
9 2 5 3
4 2
2 8 7
8 5 7 6 4
4 8
7 5 2 1 8
8 5 6 7
6 4
5 1
Hard #7
5 4 3
3 2 9 4
9 6 5
6 9 7 2
1 3 5
4 3 6 9
7 6 1 2
8 9 7
1
Hard #8
6 9 8
2 7 1 9
4 7
1 7 3
9 8 5 2
4 7 3
6 4 1 5
2 9 8
9 3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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