Printable Hard Sudoku

Set 1yjpu7h. 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
2 3 4 9
3 6 4 2
9 5 8
3 8
2 3 1 4
7 2 3
6 7 4 9
1 5 6
1 4
Hard #2
9 4 3 8
3 9
7 1 5 4 2
3 5 4 1
6
7 8
3 2 6 7
9 8 5
1 7 6 2
Hard #3
1 4
4 2 8
3 2 9
6 2 9 1 7 3
1 5 8
7 8
8 2 9
6 4 1
6 5 3 9
Hard #4
8 1 6 3 9
2 8 7 5
6 7
7 5
3 2 8 7
7 9 2 4
9 1 5 2 3
6
8 3
Hard #5
1 8
1 9 6
3 7 4 8
8 2 5 1
3 4 7
9 7 1 4
5 4 7 2
8
6 4 2 5
Hard #6
8 9 2 5
7 6 5 9
5 3 6
1 6 3
2 3 7
4 1 5
1 2 3 8
5 3
7 5 4
Hard #7
2 4 9 1
9 3 1 5 7
1 7 2
4 9 8 7
8 6
6 1
5 6 1 3
7 1 9
5 7
Hard #8
8 7
8 1 7 3
9 5 3 2
7 3 6 2 4
4 8 7
5 3
1 8 9 5
6 4 7
2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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