Printable Hard Sudoku

Set 1qaru1y. 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
8 1 5 9 4 2
9 2 8 1
4 5 6
1 3
5 3 8 6
8 9 4
7 2
4 1 7 8
9
Hard #2
6 4 7 8
1 6 8 4
2 9
9 8 1
3 9 8
4 3 1 2
1 5 3 8
3 4 1
2 6
Hard #3
5 6 3
5 9
3 2 4 5
4 1
1 7 6 5 8 2 3
5 1 6
4 2
3 1
9 1 7 6
Hard #4
6 7 8 3 2
4 2 5
6 4
5 4 3
1 3 7 4
6 2
3 2 8 1
7 8
1 3 5 9
Hard #5
3 9 4 6 7
6 2 1 4 9
4 5 9 8
1
7 8 9 4
6
6 8 1 5
7 8
4 3 7
Hard #6
3 4 5
5 9 3
6 5 1 7 4
4
1 5
6 1 8 4 7
9 8 7 3 6
2 4
5 6 3
Hard #7
3
5 6 7 3 2 8
4 6 5 3
9 2 8 5
1 7 8
4 2 1
3 2
9 5 6
9 7 8
Hard #8
3 1 2 5 6
8 5
4 1 8 3
6 4
5 8 7
7 8 4 6 5 9
9 1
5 6 8
6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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