Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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