Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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