Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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