Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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