Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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