Printable Hard Sudoku

Set 1xyx9qp. 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 3 5 4 2
1 6 4 9 3
6 5
7
6 2 4 8
8 1 9
5 7
2 8 6 1
1 7 2
Hard #2
4 8 3
7 1 8
2 5
8 1
8 4 6
7 3 9 2 4
1 6 9
9 1 4 7
2 8 7 3
Hard #3
8
9 3 4 7
1 9 3
1 3 5 6 9
9 2 7 4
9 1
7 2 8
8 5 9 6
5 4 2
Hard #4
7 6 8
6 1
1 3 7 9
5 6 3 4 1
9 1 7 6 4
2 5
3 5 8 2
9 3
4 7
Hard #5
4 9 2 1 6
7 8 1
1 6 3 4 7
8 2
5 6 1
7
9 3 5
5 4 6 3
2 9 1
Hard #6
1
7 6 5 2
2 6 9
3 9 1 5
2 7
4 1 9 2
5 6 7
4 5 9
6 4 7 3 8
Hard #7
3 5 6 4 7
9 1 2
9
2 3
7 3 5 6
5 2 8 9
8 2 4
7 9 8 2
4 3 9
Hard #8
7 5 4 9
1 4 7
2
9 5 3
6 4 2 8 5 1
3 4 6
2 5 7 8
1 8
5 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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