Printable Hard Sudoku

Set a5yqfd. 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
4 9 3
3 4 2
8 2 1
5 3 1 6
3 7 9
1 6
3 8 4 2 7
8 6 7 5
7 8
Hard #2
7
3 6 1 7
5 8 9 1
8 7 2
6 9 5 8
1 6 8
4 9
2 3
6 1 3 5 2 9
Hard #3
9 5
3
8 3 6 4
4 7 6 2 1
4 3
1 2 8 6
6 1 9
7 2
1 3 6 4 7 2
Hard #4
3 6
1 9 6 4 8 5 7
4 5 7
9 1 2 8
3 1 6
6 8 9
8
3 1
5 7 1 8
Hard #5
7 9 1 2
8
2 8 9
1 3 6 4 8
7 6 3 1 5
9 6
1 2 4 7
9 5 2
5 3
Hard #6
2 6 5
9 1 3
2 7 8
4 1 3
4 3 2 7 9 5
9 1 6 2
8 3 4
3
1 4 5
Hard #7
6 8
8 5
4 5
8 5 3 9 7 1
7 2 1 9
5 3
8 9 1
6 7 1 2
9 2 6 7
Hard #8
6 4 9 2
2 8 6 5
5 4 1
8 6 4 1
9
7 3
9 2 1 7 4
7 6 5
3 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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