Printable Hard Sudoku

Set 1xp9zlc. 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 6 3 4 1 5
5 1 7
1 8 3 4
6 9
5 4
6 2 9 8 5
9 1 2
4 7 5
1
Hard #2
9 5 4
4 7 3
7 2 1 6
9 1 6 5
3 5 4 1
1 8 9 7
3 1 2 8
2 9
5
Hard #3
6 7
2 4 9 3 7
2
9 5 3
6 3
1 3 8 9
8 2 9 6 5
1 6 7 8
6 7 2
Hard #4
8 9 5 3 4
7 5 6 8 3 2
9
2 9 3
1 9
2 6 7 5
9 1 3 4
5 3
6 1
Hard #5
2 1 4 5
7 8
5 7
8 9
1
8 2 3 6
2 9 1 8 7 4
1 7 6 2
5 8 7 6
Hard #6
9 4
9 8 7 5
1 3 9
5 9 1 4
7 9 4 3
3 6 5 9
2
6 7 8
4 7 2 5
Hard #7
4 5 7 9 2 1
6
7 5 2 4
7 1 6 4
8 5
6 8 1
3 4 5
2 9 8
6 3 4
Hard #8
3 9 8
9 2
4 5 8 1 3
1 6 4
6 5 3
9 2
7 6
9 5 2
3 2 5 7 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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