Printable Hard Sudoku

Set 7hvvi9. 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
6 8 1 2
3 4 8 1
1 7
8 3 2 6
9 6
5 6 7
1 6 7
9 2 1
6 8 3 5
Hard #2
7 3 1
1 6 5 3
9
5
1 8 4 6 9 7
3 1 5
5 4 8 6
9 4 2 5 6
3 4
Hard #3
5 6 8
1 3 2 7
5 1 9
7 8 2
3 6 2 7
9 5
3 2
8 5 3 4
6 1 2 5
Hard #4
5 1 6
5 9 3 8
6 4
3 7 8
2 4
4 1 9 8
7 4 3 6 8 1
5 9
8 7 4
Hard #5
3 1 5
5 8 1 7
2 8
8 4 5 9
3 7 8 4 2
9 3
9
2 8 7 4 3
7 3 8
Hard #6
3 4 2 6
9 8
5 3 6 7
7 5 6 2 3
6 1 8
4 3 1 2 6
4 7
8 6 7 5
Hard #7
5 3 1
2 8 4
4 6 2 8
2 1 9 8
8 5 2 7
9 6
4 7 8 6
6 2
4 1 7
Hard #8
5 1 7
9 6 5
2 6
9 4 6
6 5 4 3 1
3 2 5 4 7
8 1 3 6 4
9
4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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