Printable Hard Sudoku

Set n9uyrn. 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
4 3 9
5 9 1 6
1 7 6
6 2 1 5 3
8 5 1 7 3
3 7
3 2 5
8 2
1 6
Hard #2
6 5 9
3 4 7 8
6 9 8 7 1
6 7 5
8 7 9
4 8 9 3
8 9
7 1 5
5 3
Hard #3
3 7 1 8 4
8 4 3 7 9
1 8
1 5 3
5 8 2 3 6
6 8 9 1
9 3
2 4
5
Hard #4
9 5 2 7
7 3 6 5
1 7 9 6 4
3 9
2 4 6 3
8 1
2 8 3 4
5 9
4 6
Hard #5
3 4 7
4 6 1 8
1 6
3 1 5 6
8 3 7
6
8 5 6 9 3
4 2 5
6 3 4 9
Hard #6
5 6 7 2
2 4 1
1 5 8
5 8 3 1
6 4 9
8 5
6 2 4 3
9 5 6
1 2 7
Hard #7
7
3 8 2 4 6
1 5 8 4 3
9
3 2
2 7 9
1 9 3 7
7 3 8 5 1 4
5 8
Hard #8
2 3 1
4 8 5 2 7 1
6 7 2 5
9 5 7 8
2 7 3 6
8 9
5 6
6 3 4
2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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