Printable Hard Sudoku

Set hp09f8. 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 2 3
5 6 1
8 2 9 6
3 5 7 1 9
9 3 4 7
1 7
6 5 9
8 1
3 7 4
Hard #2
6 2 5 4
9 7 3 8
2 3 7
9 5 4 7
7 4 1 5
1
8 5 9
4
3 5 7 9 6
Hard #3
8 2 1 6
7 4
5
6 3
6 4 9
8 4 1 5 7
9 6 7 3
2 3 8 4 1
1 5 6
Hard #4
9 4 5 8
1 5 9
8 5 2 7 1
2 6
1 4 3 9
9 8
9 7 2 5
4 2 7
7 6
Hard #5
8 1
5 1 9 3
2 7 9
9 6 2 7
8 7 9
9 5 4
2 1 3 4 5
8 4 2
5 9
Hard #6
4 8 3 5 6
9 7 3
5 8 7
9 5
5 7 2 3
1 8 6 7
7 5 2
4 5 6 2 1
Hard #7
9 8 7
7 1 8
7 9 5
6 2 1 7
4 8
4 6 3 2
4 2
8 7 5 2 4 1
1 7
Hard #8
5 7
3 2 8
4 1 8 5
2 8
7 9 5 2
9 6 7 4
7 9 1 5 2
1 8
4 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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