Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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