Printable Hard Sudoku

Set 13kst0v. 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
6 9 1
5 9 4
3 8 6 9
4
6 7 3 4
7 6 9 5
4 2 9
6 3 2
2 5 3 7
Hard #2
9 8 4
3 5 2 9
7 1 8 3
7 4 6
5 3
9 5 7
3 1 6 4
6 5
5 4 9 1
Hard #3
9 1 7 6
6 4 5 8 7
8 6 5
9
6 7 2
2 3 4 9
4 6 2
9 3 2 1
7 9
Hard #4
8
8 3 7 5 1 9 2
5 1 6 7
3 5 6 2
1 5 4
3 6
7 4
2 6 5 7
9 1
Hard #5
3 4 1
7 2 6 5 3
8 9
5 7 3 4
3 1 8
2
1 8 6
7 8 4 5
8 3 2 9
Hard #6
2 7 8 4
4 2 9
8 5 1
1
4 5 1 6 9 8
7 2 4
7 3 8 1
9 8
6 2 3
Hard #7
9 6 3
3 6
3 1 6 5
3 9 5
7 4 2 9
9 6 3 8 1
6 8 9
6 7
2 5 4
Hard #8
6 1 5 3 7 2
3 5
7 1 2 9 5 3
5 8 9
5
4 3
8 2 4
6 4 3 7
7 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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