Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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