Printable Hard Sudoku

Set 1qv35l8. 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
2 9
6
1 5 9 8
3 4 6 9 7
5 6
7 9 3 2
6 1 2
7 9 8 3
1 8 7 3
Hard #2
9 4 3 8 2
6 2 7
2 4
1 5
8 6
6 9 4 3
4 7
7 5 8 1 4
2 9 7 3
Hard #3
2 1
9
2 8 3 4 5
3 6 8 2
7 1 5 4
4 3 8 1
7 5 9 1
8 6
4 8 9
Hard #4
4 2 5
2 9 8
5 8 1 3
8 2 5 9
1 3
7 2
8 3 7 9 5
1 3 8
9 6 7
Hard #5
1 2 6
9 7
7 2 3
9 8 3 4 1 5
1 6 5
1 6 9
8 3 9 7
4 3 2
4 5
Hard #6
3 7
2 6 8
9 4 3 2
1 3 5 9
8 2 4
5 2 7
3 9 2 5
9 8 5
6 1 4
Hard #7
5
8 9 1 4 3 5 6
4 8 6 2 9
2 5
8 7 1
6 7 4
3 1 2
6 3
1 3 7
Hard #8
9 6
7 1 3 5
3 6 8 1
3 4 7
7
6 4
5 6 3 7 2 9
2 8
9 1 2 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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