Printable Hard Sudoku

Set 1pr8lgy. 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
9 6
5 3 6 7
6 1 7
4 6 3
2 3 4
2 8 5
4 1 3 8
3 7 9
7 5 2 9
Hard #2
7 2
5 1 8 2 3 6
4 6 1
5 6 1
7 5 8
4 2 7
9 3 6
4 9
5 2 1 7
Hard #3
2
3 7 2
2 1 5 8 4
8 2 5 6
8 1
6 4 3
6 3 1 8
4 9 8 3
2 8 9
Hard #4
7 8
8 5
2 3 6 7 5
9 3 7
7 1 6 4 9
9 4 8 5
5 2 1 3
6 4 1 7
Hard #5
9 8 6
9 4 6
6 3 4 5
3 4 8 5
9 7 2
5 9 1
6 1 4 3
2 7
1 2 7
Hard #6
3 1 8 9
8 6 4 2
5 6 8
2 9
5 2 8 4
9 7 8 2
6 1 7
6 4
1 2 5
Hard #7
5 3 6 9
8 6
9 2 3
1 9 6 3
1 9 7 2
5 2 7
3 4 9
3 5 6 4
8 2
Hard #8
6 9 8
1 6
3 2 5
2 7 6 1
5 9 8 1 7
3 9 4 5
1 3
1 4 5 2 9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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