Printable Hard Sudoku

Set 1vy8fzh. 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 5 7
6
7 4 6 3 8 1
4 5 7 8 9
2 7 5
1
7 4 9
5 3 9
4 1 3 6
Hard #2
4 6 3
7 8 1
9 1 8 4 7 2
5 9 3 8
3 1
8 3 7
3 4 8
2 9
6 9 8
Hard #3
8 3
9 5
3 4 5 8 2 9
3 1 9 7
8 2 4
5 3
1 9 7 5 8
8 9 1
7 4
Hard #4
2 5 3 9
3 8 2 5
1
6 3
1 5 9 4
8 3 7 2 9 5
6 4 1
2 7 4
6 9
Hard #5
3 1
5 7
9 4 1 8
1 7 5 4
6 9 5
8 4
1 2 5 9
3 8 4 9
6 5 8 4
Hard #6
6
8 1 2 4 9
2 7 3
3 8
1 9 2 8 6 4
5 7
9 3 5
4 5 2 9
1 4 8
Hard #7
1 6 7 3
4 6
3 7
5 3 1
2 4
7 3 5 1 2
4 8
3 7 6 1 4
2 4 9 7
Hard #8
5 2
3 7 1 8
3 6
5 9 6 8
8 7 9 1 6
6 5
5 6
2 6 4 3 9
6 7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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