Printable Hard Sudoku

Set h5f8fa. 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 6 7 9 4
5 8 6
9 3
7 5 8
4 1
4 7 5 2
9 4 7 6
7 3 2 8
6 8
Hard #2
8 3 2 7
4
8 9 5
2 9 6 7 5
4 3 8
1 3 7
5 7
9 2 6 4 8
3 9 7
Hard #3
6 9 7 8 1
5
3 9 8
2 3
8 1 3 9 2
5 3 9 4
2 4 1 9
1 4 6
7 8
Hard #4
8 5 9
3 2 5 6
4 9 7
4 7 5 3 2
3 1 2
5 7 8
9 4 5
5 3
1 5 7
Hard #5
9 5 1 4
4 5 2 8 9
9
7 8 3 5 2
2 5 4 7
9
5 7 9
1 8
8 4 2 9
Hard #6
4 8 1 2
7 3 8 5
5 4 7
2 3 7 6
9 1
4 7 1
2 6 7
5 9 3 8
1 5
Hard #7
7 5 6
6 8 4
9 3 8
3 2
2 5 4 1
4 1 8
7 2 8 1
3 9 7 5
2 5 8
Hard #8
2
8 9 7
2 1 8 5
3 2 5
4 9
6 5 7 1 3 8
8 1 3 7
4 1 9
3 2 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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