Printable Hard Sudoku

Set 13xo0jc. 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
8 9 1
9 5 2 1 6 4
4 2 5
8 6 3
4 5
9 1 4 2
7 8 2 6
2 7
6 4
Hard #2
4 8 2
8 2 6
2 3 7
3 8 4
1 6 8
5 3 6
6 3 9
5 2 7 1 6
8 7 4
Hard #3
4 3 1
6
6 1 9 2 8
7 8 1 3
4 2 8
6 7 9
6 2 8
5 4 2
7 1 3 8
Hard #4
4 5 2
7 3
9 2 8
6 8 2 3 5
7 1 5
6
1 8 9 7
4 5 3 9 8
7 4 1
Hard #5
2 5 8 7
6 1 9 2
7 3 4
9 4 1 7 8 3
1 7
2 9
3 9
5 1 6
3 4 6
Hard #6
4 1
6 9 5 4 7
2 8 5 3
1 9
7 4 1 2 6
5 8
8 9 2
7 5 8
2 3 5
Hard #7
9 5 2
4 2 3 1 9
8 7 6
7 3
4
5 3 6 7 8
8 7 6
4 8 2 1
1 5 9
Hard #8
1 6 7
8 3 5 4
9 7 8 3
5 7 9 6
9 5 4
8
1 3
5 4 6 2
5 2 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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