Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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