Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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