Printable Hard Sudoku

Set 13yvra0. 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 7
8 5 6
7 1 2
9 4 6 7 2
3 5 8
1 4 3
8 7 1 2
4 2 6 5
5 9
Hard #2
5 6 8 7
6 5 9 2 4
7 6
5 2 4 1
7 1
8 5
1 7 3 6 4
8 4 3
9 1
Hard #3
5 6
4
3 8 6 7 1
4 8 2 1
7 4 2 6
8 6 9 5
6 1 8
6 3 9 2
4 6
Hard #4
8 1 3
5 4
2 7 3
3 5 2
4 2 8 1 9
8 9 2 4 5
9 6 8 4
2 1 6
3
Hard #5
2 6 1 5 8
1 5 8 2 7
9 1 5
6
3 4 1 7
1 6 9
5 1
8 4
8 7 6 5
Hard #6
5 1 7
9 7 3 4
4 2
7 5 9 6 3
1 2 5
4 6 2
7 1
9 3 6 2
4 6 3
Hard #7
2 3 8 7
6 5
5 4 9 1
3 2 6
3
1 7 4 9 5
6 4 5
4 9
4 5 8 1 2
Hard #8
4 2 5 3 6 9
7 4
6 4 3
9 3 8
1 6 8 4 5
5
6 7 5 1
8 2
1 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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