Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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