Printable Hard Sudoku

Set d9v7l0. 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
6 7 2 5 9
7 1 3
1 2 8
6 8 3 9
4 5 6
2 6 7 4
9 3 2 4 8
3 5
Hard #2
1 7 3 4
9 2 5 6 7
7 9 8 6
3 9
7 8 2
1 5 6
5 2 3
5 1
3 8 9
Hard #3
5 9
2 1 5 4 7 9
7 2 1
3 2 7
5 4 9 2 7
6
9 1 8 5
7 3 8
9 1
Hard #4
5 9 4 3
8 3 1 6 4
7 6
6 9
1 5 3
6 4 5 7
6 1
8 3
2 9 4 1 5
Hard #5
6
3 5 9 2 8 1
1 6 3
7 1 5
3 2 9 8 1 5
6 4
5 1 9
9 7 5
1 3
Hard #6
4 1 5 6 8
5 9
1 3 2 4
7 6 8 9
4 3 5
8 1 6
8 5
4 6 1 7 5
2
Hard #7
9 7
2 8 6 3
3 2 7 6
7 4 3
5
4 7 5 9
2 5 1 6
6 8 2 4
7 1 5
Hard #8
6 1 9 2
9 3 6
1 8
3 6 9 1
1 5 9
2 4
2 5 4 8 1
3 7
7 1 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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