Printable Hard Sudoku

Set wqpv2n. 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
7 9
8 4 1 3
8 7
7 9 3 8
8 6 7 5
3 2
3 4 9 6
6 5 9
4 8 7 1
Hard #2
8 3 7 1
1 3 6
6 7 2 9
8 5 6 7 4
7 5
6 4
7 8 3 5
1 2
1 5 8
Hard #3
8 9 1
6 1 4
8 4 6 7
1 2 8 9
7 1 3
6 8 5
8 6 1 4
4 8
7 8 6
Hard #4
1 9 5 8 2
5 2 7
3 6 2 8
4 5
8 5 4
3 6 2
7 6
5 9 1 4
1 6 5
Hard #5
8 6 2 9 7
3 4
1 9
3 2
9 7 1
4 8 2 7 9
1 7 6
9 6
7 4 5 9 3
Hard #6
2 8 9 6
1 3 4
9 6 7
4 6 2 9 5
4 6
6 2 5
5 7 4
6 9 3 5
3 6
Hard #7
6 5 9 4
3 9 4 1
1 3 6
1 5 9 3
2 9 6 7 8
7 3 2
3 5 7
5 4
1
Hard #8
2 9
4 5 7
3 5 1 8
8 1 4
2 1
5 3 9 2
9 7 4
1 7 2 6
5 1 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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