Printable Hard Sudoku

Set dx9hsa. 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
2 9
8 9
7 1 3 6 8
8 9 5
5 1 6
9 4 8 1 3
6 3 2 5
2 1
3 6 8
Hard #2
9 6 4
2 9 3
6 4 9 2
5 7 6 9
3 9 6 8
8 1 2
7 2 5 9 8
3
4 1
Hard #3
4 5
8 1 7 6
2
2 6 3 1
4 5 9
3 5 1 7 8
7 1 3
4 7 9
9 4 7 1
Hard #4
4
4 6 9 7
1 9 2 6
6 5 8 2 3
8 9
5 7 6
1 6 7 8
4 7
4 9 6 1
Hard #5
2 6
7 9 8 2
8 6 9
5 3
4 5 9 7
3 1 4 8
4 2
3 4 2 6 1
1 6 7
Hard #6
1 7 3
6 5 8 2
5 6 1
2
5 7 6 2 8 4
7 1 6
2 3 4 9
4 7 9 8 5
Hard #7
2 7
7 6 1 3 2
1 3
5 2 8
7 9 8 5
3 4 7 9
1 6 4
5 6 3
4 3 1
Hard #8
7 8 3 5
3 9 5 8
9 2
3
1 9 8 7
8 6 7 1
4 3 7
5 9 1 3
1 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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