Printable Hard Sudoku

Set 3svqh9. 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 4
3 7 1 2
5 2 7 3
3
7 4 9 6 2 1
2 5 9
6 5 4
7 1 9
4 5 9
Hard #2
3 7
2 1 6
7 6 8 1
8 1 2
6 4 3
9 6 5
9 2 7
7 3 5 1
6 7 2 3
Hard #3
5 4 3 1
4 5 3 8
6 7 9
4 3
2 9 7 5 6
6 3
4 1
8 1 6 9
7 6 1
Hard #4
4
5 8 3 1 2
9 6 5
1 3 2 9
4 8
7 4 5 3 2 1
3 5 6
9 7
7 4 5
Hard #5
1 6 4 5
5 9
5 1 4 6 7
8 2 6 3
4 2 8
3 2 9 6
7
6 5 9
1 8 6
Hard #6
1 3 5 8
9 6 4
2 4 8 5 7
6 4 8 5 1 7
7 9 6
2
8 3
9 2 7
5 4
Hard #7
2 7 6 4
5 2 8
1 7 2
3 9 2 8 4
7 3
2 4 1 8 3
7 5 8
6
2 3 6
Hard #8
3 2
6 7 3 4
3 1 8 9 6
6 3 1 9
7 6
9 5
4 7 6
5 7 2 8 9
4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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