Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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