Printable Hard Sudoku

Set 13ymig7. 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
8 7 6 4 3
7 8
1 9 5
3 9 7
6 9 3
5 2 6 9
2 4 9
1 6 7 2
9 5
Hard #2
3 1 7 6 2
6 5 8
4 3 7
8 7
2 6 9 5
6 9
4 1 3 9
7 3 2 4
4 1
Hard #3
7
1 5 4 6 2 3
3 2 7
4
8 9 3 6
7 9 5 3 8
3 8 6 4
5 7
7 1 9
Hard #4
8
4 5 6 8
3 4
2
9 3 6 5
4 9 1
3 8 6 1
1 7 9 8 2
9 4 5 3 6
Hard #5
1 4
4 7 1 9
5 7 8
7 8 9 5 6
2 9 4 3
5 6 1
4 8 2 7
9 8 1
3
Hard #6
6 8 2
7 1 5 3
5 4
5 4 2
7 9 2
4 7
1 9 4 8 7 5
3 8 5 2 1
8
Hard #7
4 9 7
4 5 6 1
2 8 3 9
6 5 1 8
5 3
2 8
7
8 1 9 6 7
8 6 1 4
Hard #8
6 5 9
4 3
1 5 9 7 8
8
6 5 4 2
9 7 6 1
4 3
8 7 2 3 1
2 6 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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