Printable Hard Sudoku

Set xts5pm. 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 2 8 6 3
1 9
3 4 9 2
5 7 2 3
6 1
3 7 9 8
5 7
6 8
4 9 8 2
Hard #2
6 5 3 9
5 8 6
9 1 2
6 5 7
7 2 9
4 9 6 7
2 7 1
1 6 3
9 4 7
Hard #3
2 1 9
5 8 4
4 9 6 1 8 3
2 5 9
8 3 7
6 5 1
4 9 5 6
7 2 3
1
Hard #4
1 5
8 4 9
9 1 8 7
6 9 2 5
8 6 4 1
9 5 4
1 4
4 3 7 2
5 7 6
Hard #5
5
3 6 1 2
4 7 8 9 1
6 5 1
9 2 3
8 6 5 7 4
7 1 6
2 9
4 5 1
Hard #6
6 3 1 4 2 8
5 8 7 3
1 2
6 8 4
9 2 3 8 6
5 3 7
1 2 6 3
8 6
Hard #7
4 1
8 4 5 6
8 3 7
4 2 6 9 7
6 5
9 6 4 1
6 7 8 4
3 6 9
1 2
Hard #8
6 4 5 2
4 7 9 6
2 9 6 8
6
8 3 4
4 2 1 5 6
8 4
5 3 9
1 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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