Printable Hard Sudoku

Set c7n8dr. 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 6 8 4
4 5 8 9 6
3 6
7 9 6
1
4 3 2 7
7 9 5 4 6 8
1 2
2 5
Hard #2
7 5 9
4 8 3
6 9 4
6 2 9 1 5
2 4 3 6
4 5 1
4 2 8
1
2 7 1 9
Hard #3
1
3 7 4
8 4 6 2
6 7
1 3 6 8
7 9 3
4 5 2 9 1
7 5 2 9
6 2 5
Hard #4
2 1 6 4
3 4 5
4 6 9 2
6 2 3
7 5 8 2
3 6
3 7 1
1 8 6
8 4 1
Hard #5
3 2 4 9
8
5 4 3
9 1 3 5
1 2 9 5 3 4
3 4 2
3 6 2 8
4 7
9 2
Hard #6
8 6 5
9 4
1 3 5 7
2 1 7 6 9 4
2
5 9 3 8 7
6 5 2 4 8
3 8 1
Hard #7
5 6
2 7 5 8
9 3 4
1 3 8
1 9
8 9 7
7 2 8 6
4 1 8
5 6 2 9 7
Hard #8
7 5
3 9 2 4
8 4 7 9
9 4
8 2 3 7
3 6
1 9 8 6 7
4 9 6
2 7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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