Printable Hard Sudoku

Set eax2vk. 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
5 7 4 1
8 9 3 6
9
4 9 8 2
6 4 7 8
2 1
9 2 5
5 6 3 4
6 7 1
Hard #2
7 8 4 6
1 8
7 2
4 1
2 4 3 9 5
8 9 1 3
7 5 6 9
2 9
5 7 4 2
Hard #3
2 3 5
9 6 8
3 1 4 9 5
8 4 5 2
2 7 1
1 7 4
8
4 5 6
4 5 8 7
Hard #4
7 1 8
6 2 3 9
3 4 6 8 5
2 8 4
3 4 2 9 7
9 3
5 8
7 3
2 3 1
Hard #5
5 1 3 7
1 7
4 6 8 1 5
3 2 7 6
2 7 3
5 1 9 4
1 4
4 8
2 9 8
Hard #6
9 4
7 9 8
6 8 2 3
9 8 2 6 5 1
3 9 4
7
6 3 5
2 4 1
1 2 7 5
Hard #7
1 6 9
2 4 9 1
9 3 4
2 5
6 7 3 8 9 1
9 8 7
5 8
6 2 4 7
8 6
Hard #8
4 3 1 6
7 5
6 9 8
2 4 5 6
1 8 5
2 3 8
3 1 6 2
4 5 1 3
2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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