Printable Hard Sudoku

Set rs7nj0. 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
7 8 6 4
5 7 6 8
2
1 3
4 7 1 6
2 3 9 5 4
6 8
1 3 2
2 3 9 1
Hard #2
4 2 1
7 6 4 9 8
3 8 9 2
6
1 8
2 7 4 9 1
2 7
7 4 3
3 9 2 5
Hard #3
3 8
1
1 2 3 8 5 7
7 9
5 2 8 3 4
6 7
1 3 8
6 5
7 8 2 6 4 9
Hard #4
4 9 6
9 5
7 1 9
6 3 2
5 2 1 8 9
1 9 4
7 9 1
7 2 6 5
3 2 8
Hard #5
6 9 3
9
3 4 7 6 8 2
7 3
4 5 8
9 6 3 1
7 9 4 3
3 9 5 6
1 4
Hard #6
8 4 2 7
8 7 4
7 4 9 6 2
2 3 5 9
3 1 4
6 1 5
9 5 2
7 9
4 8
Hard #7
5 6
2 9
1 7 6 8
8 1 9 5
9 4 1 7
6 9 2
5 3 4
2 6 5 4
1 4 9
Hard #8
4 7 8
5
8 7 2 4
4 2 9 3
6 8 1 2
9 4 6
4 2 1
5 3 6
9 6 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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