Printable Hard Sudoku

Set 7t5dqv. 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
9 8
6 9 1 5
6 3 2 1
2 4 1 7 9
7 8 2 5
9 6
6 3 8 7 4
8 5 7
Hard #2
8 1 4 6
2 6 9 5
1 7 2
9 7 2 6
1 3 8 7
8 6
6 2 5
5 3 4
2 9
Hard #3
8 5 4 3
2 3 5 1
7
8 1 7
3 4 6 8
5
2 3 9
8 1 7 3 5 2
9 1 2
Hard #4
5 9 7
3 6 1
2 8
7 4
1 5 6 9 2
6 3 1 4
2 9 5
6 9 4 1 7
7 2
Hard #5
9 1 7
7 4
6 2 4 9
9 6 3 7
2 1 9 4 3
5 2
4
4 5 3 7
1 7 3 5
Hard #6
1 6 9 2 7
9 1 4
6 2 5
8 4 7 1 9
5 6
3
5 9 1
7 8 2 5
7 4 3
Hard #7
9 6 4
1 5 8
7 1 3
7 2
5 9 7 1 4
6 3 7
2 6
1 5 3 6 9 2
8 3
Hard #8
4 5 9
6 9 1 4
3 2 8 1 6
4 7 2 3
2 6 7
4 3 9 1
7 2 5
6 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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