Printable Hard Sudoku

Set h2c2qp. 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
7 2 9
9 6
1 6 2 7
9 4 1 5
3 4
7 8
8 4 3 6
3 2
4 1 3 8 7 5
Hard #2
8 6
9 4 1
4 3
6 5 2 9 1
8 6 7
7 9 6 5 2
7 8 2 1 9
5 9 3 8
Hard #3
9
3 8 1
1 9 6 5 3 4
5 4
9 6 2 3 1
3 8 5 6
8 6 4
1 4 5 7 9
Hard #4
2 6 5 4
6 3 5 2
2 9 7
4
2 7 3
4 9 7 3
9 6 2 7
8 9 6 1
4 5
Hard #5
7 4
6 4 9 7
3 5 4
1 6 3
8 6
5 2 9 4
1 9 5 3
8 3 7
6 8 4 9
Hard #6
8 3 2
2 6 1 7 3
9 1 6
9 7 4 6
1 9
1 3 9 7
4 2 6 3 1
7 2
6
Hard #7
4 1 5
7 9
9 6 2
9 5 2 1 7
3 9 7 2
8 6 9
9 2 6
7 6 9 8
3 7
Hard #8
5 8 2
7 5 3
4 6 9 1
4 1 8 6
8 5
9 3
2 3 6
3 1 7 9
5 1 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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