Printable Hard Sudoku

Set 1my0hh1. 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
4 2 9 3
9 7 8
3 4 9
7 2
4 2 3 6
5 1 4
8 3 5 7
2 3 5
3 1 6
Hard #2
6 2 5
7 2 4
2 1 8
4 7 9 3
3 2 8 5 9
1 2
4 8
8 4 1
3 6 4 7
Hard #3
6 1 4 5 7
5 7 8
4 1
8 9
7 6 5
9 2
3 6 1 2
1 9 6
5 4 8 3 1
Hard #4
2 8
4 5 2
9 7 3 1
3 6 1
7 1 5 3
9
4 1 7 5
1 5 8 7 4
7 8 6
Hard #5
1
4 6 5 3
6 1 9 2
3 4 2 1
6
1 9 7
5 7 4 1 6
5 7 8
3 8 1 2
Hard #6
3 5 8
5 4 6 3
7 6
7 8 9 2
4 3 1
1 9 5
6 2 3 7 8
4 2
8 5 1
Hard #7
4 5 3 1
5 1 8 4
4 5 7 8
8 7 4 6
5 2 9
3 5 7
2 7
5 1 3 6 4
Hard #8
9 3 5
5 6
3 1 2 4
2 1 4
1 7 8
3 7
5 1 2 8 6 9
8 6 5
7 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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