Printable Hard Sudoku

Set 1ksi5fq. 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 2 6
8 3
6 2 8 5
4 7
7 8 5
8 6 4 1
9 6 8 7
2 1 5 4
1 3 8
Hard #2
3 8
6 3 9 4 7
7 2
2 8 1 9
6 4 5 2
5 1
6 8 7
8 3 6 9
7 4 5
Hard #3
6
4 6 7 1 8
1 6 3 7
1 2 9
5 4 9
3 2 7
5 9 4
2 7 3 5
4 8 9
Hard #4
6 5 7 1 3 8
9 4
8 5
9 8 6
8 2 4 9
3 4 7 5
6 1 7
5 3 6
2 5
Hard #5
1 5 2
3 8
4 7 6 3
2 3 8 9 5 4
8
5 1 9
4 2 6 1
9 3 2
6 8 7
Hard #6
5 9 7 6 2
4 9 8
7 8 3 6
3 8
2 9 4 6
4 1
5 4 3
2 5 1
1 8 2
Hard #7
7 3 6
9 7 2 8
5 8
4 8 2 7 3
8 1 4
5 1 6
4
1 3 2
6 5 9 4 7
Hard #8
1 3 7 6 5
6
8 1 3 2 9
9 2 4 6
3 1 9
1
5 6 7 2
8 6 3 4
9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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