Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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