Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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