Printable Hard Sudoku

Set vys3ba. 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
5 4
8 3 2 6
7 2 4 8
6 3
4 3 7 1 5 2
1 2
1 2
3 8 1
6 4 9 7
Hard #2
3 5 8
6 4 8 2
6
3 4
7 6 9 1
9 5 3 8
2 6 7 4 8 5
7 3 5 6 9
Hard #3
6 3
2 7 1 6
7 4 2 8
5 2
9 3 4
1 5 3 9
9 8 6
4 1 7
1 7 9 2
Hard #4
3 9 7 1
6 5
9 7 8 6
8 6 2
5 4
9 7 2 8
2 4 5 8
1 8 2 9
8 1
Hard #5
6 3 2
8 4 6 1
5 3 6
1
9 2 7 6
6 7 2
3 1 5
4 5 1 7
7 8 9 1
Hard #6
2 4
9 1 4 7 5
7 6
8 4
5 7 9 1 8
1 6 2 7 3
2 3
5 1
9 1 2 7
Hard #7
7 5
7 3 6
8 1 4
2 3 7 1 4 5
6 2 5 3
6 8
9 6 2
2
1 4 5 3 9
Hard #8
3 9 7
5 9 6
2 6 8
3 2 6 7 5
4
8 4 3 1
6 9
4 6 2 5 1
3 7 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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