Printable Hard Sudoku

Set 17oczey. 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
3
5 6 7 3 2 8
4 6 5 3
9 2 8 5
1 7 8
4 2 1
3 2
9 5 6
9 7 8
Hard #2
3 1 2 5 6
8 5
4 1 8 3
6 4
5 8 7
7 8 4 6 5 9
9 1
5 6 8
6 2
Hard #3
5 6 8 2 4 3
9
4 8 5
7 3
3 1 7
9 8 7 6
5 6 9 2
3 1
7 2 5 6
Hard #4
1 2 7
3 8 1
8 1 4
7 5 3 9 6
5 8
3 6 7
4 9 7
7 6
6 3 1 5 7
Hard #5
3 6 1
1 3
7 2 6 5 9
9
2 8 1 3 4
5 3 7
9 2 8 1
8 3 1
1 4 7
Hard #6
4 3 5 7
8 3 2
9 6 1
4 2 9 8 1
1 5
8 7 2
1 9 4
7 4 8 1
6 9
Hard #7
3 7 5
1 2 7 8 4
1 9
1 8 2
2 6 9 3
8 7 9
5 6 7
8 2 5 4
3 9
Hard #8
4 8 1 2 5
2 8 4 1
9 5 7 6 8
3 7 5
6
1 8 5 2
2
9 3
3 2 6 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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