Printable Hard Sudoku

Set dx3xzt. 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 5 1 9
8 9 4 6 3
2 1 4 5
8 1 3
5 6 7 2
3 9 1
2 8 3 9
6 5
Hard #2
9 4
1 3 2 5
7 2 6
4 5 1 8
5 9
6 3 4 9 2
3 7 8
3 4
2 4 6 1
Hard #3
9 8
8 4 6 7
4 6 9 2
7 5 2
8
6 1 9 7
3 8 2 6 7
8 4 6
4 3 5
Hard #4
7 1 2
9 4 3 6 7
8 6 4
3 4 2 9
2 9 1
4 6 9 8
5 9 6
3 5
2 8
Hard #5
6 1
4 8 7 9 6
4 2
1 7 4 5
9 7 6 8 4
3 1
7 4 5 1 8
8 9 5
2
Hard #6
1 7
2 3 5 6
4 3 6 2
7 2 5 8
4 9 1 7
8 9 4
8 4
2 4 3
3 9 5
Hard #7
5 6
3 4 2 6 5
1 2 4
8 9 5
6 8 4 7
1 5 7
2 1 5
8 6 3
3 6 9
Hard #8
5 9 4
4 2
6 3 4 5 1 9
2
5 4
9 7 4
7 6 8
6 1 5 9 4
3 4 1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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