Printable Hard Sudoku

Set fp0m9m. 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
7 5 6 4 8
6 8
8 2 7 3
9 2
3 9 8 5 7
6 8 2 1
8 7 5 1 3
8
4
Hard #2
9 7 4
5 1
1 4 6 8
8 6 9
8 4 3 6
6 1 4 2
9 8 1 2
5 9
7 3 5
Hard #3
7 2 1 5
3 5 2 1
4 9
1 6
5 4 2 3
3 5 9 7
2 7 3
3 2 1
4 3 8
Hard #4
5 4 2 7 1
9 2 4
2 7 5
5 6 7 8 9
4 2 3
7 1 8
6 3 7
7 3 5
9
Hard #5
1 3 4
9 4 7 6 5
6 5 9
9 8 6
3 6 7 2
2 3
9 4
8 9 5
4 6 2 3
Hard #6
2 6 5 1
9 2 5 4
7 9 3
4 2 7 3
5 6 8 7 2
8 4
4 7
6 3
6 1 9
Hard #7
2 4
7 6 2 1 5
4 7 1 8
2 5
6 3 9
1 3 8
9 8 4 6
2 3 1 6 5
1
Hard #8
2 6
7 9
8 6 7 1 3
2 3
4 8 7 6 1 5
1 3 4 9
3 5 8 4 6
6 4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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