Printable Hard Sudoku

Set 1qyvs2i. 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 1
9 1 3 5
8 4 5
7 6
3 2 1 7
7 1 5 9
5 4 2
6 5 9 8 3
1 7
Hard #2
4 5 9 2
6 8 7 5 3
8 1 6 9
2 3 6
9 3 7
5 3 4 8
3 8 1 2
1 6
Hard #3
2 5 6 8 9 7 1
5 8
1 8 4
4 9
3 4
4 2 6 8
1 8 7
3 9 6 2
2 8
Hard #4
5 8 1
6 2
5 2 1 9 7
9 5 4
4 1 3 9
9
1 6 4 2
8 2 1
7 3 5 8
Hard #5
5 8 3 2 1
9 7
9 5 2 1 8
8
3 8 5 2
7 3 6 8
7
5 6 4 2
8 3 5
Hard #6
5 9 3 8
4 7
6 5
7 2
1 4 2
9 2 7 6
3 9 8 4 1
1 8 7 6 9
9 1
Hard #7
5 2 9 3
2 7
6 8 7 9 2
4 3 5 2
9
5 7 1 4
5 3 4 1 7
7 2
6 4
Hard #8
1 4
2 8 1
7 2 9
6 7 3
5 9 7 8 2
4 7 5
2 7 3
7 9
9 5 8 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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