Printable Hard Sudoku

Set jjn5s0. 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 6 7
7 6 5 2 9 4
2 4 6 1
9 5 8
8 4 5
3 1 6
3 2 7 9
7 1 3
Hard #2
4 1 9
3 4 6
8 7 5
1 4 8
7 5 4
8 2 6 9
7 9 1 2
2 7
4 5 2 9
Hard #3
8 1 2
6 7
7 4 1 8 3
2 7 3
5 1 6 9
4 5 8 1
8 7 3
6 1 2 5
1
Hard #4
9 4 7
5 6
8 5
1 3 2 8 7
5 8 9 2
9 6 1 5 4
8 2 6
2 1 8
6 4
Hard #5
6 3 9 8
2 7 5
6 8 9
7 8
2 6 1 9
7 5 2 4
9 3 6
3 7 2
9 5 7
Hard #6
5 7 2 1
9 2 3
6 8 4
3 2 5
1 9 8
7 4 9 2
8 7 4
9 3 7
9 1 5
Hard #7
2 6
6 1 3
7 9 3 4
6 5 9
5 7 3 8
4 5
6 2 8 1
7 5 6 9
4 2 8
Hard #8
1 2 4
2 7
4 8 2 5 6
6 4 5
8 7 2
4 3 9 1 8
5 1
5 6
1 9 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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