Printable Hard Sudoku

Set 1xp77h7. 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 8
3 6 5
7 9 1 4
1 2 6 9
5
6 8 3
9 1 3
4 7 8 2
1 2 4 7 3
Hard #2
3 8 6 5
9
1 8 9 6 2
4 7
5 2 3 8
1 5 9 4
1 4 7 6
5 1 4
9 8
Hard #3
4 1 6
8 5 2 1
6 8 3 4
7 2 4 5 1
4 6 7
5 9 6
8 5
2 8
6 4 7
Hard #4
4 5 6 9 2
8 7 1 3
5 4
4 1 3 2 6
5 1 8
3
4 8 9 3 1
1 6
9 4
Hard #5
9 1
7 8 2 9 6
1 3 9
2 9
8 7
9 7 5 6
3 1
7 4 2 3
4 8 9 1 5
Hard #6
7 2 8
6 2 4 5
9 3 6 1
6 1
7 3
2 8 3 4
8 6 4 5 1
9 5
1 2 8
Hard #7
2 5 4
7 4
4 5 9 7 1
1 5 7
8 7 1 5
9 3 1
5 8 2 6
3 9
7 9 4
Hard #8
4 6 1
3 9
6 8 9
7 4 2
8 7 1 4 3
3 2 5
7 1
3 9 8 2
4 5 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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