Printable Hard Sudoku

Set 1k5hzds. 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
3 4 8 2
6 2 7
1 6 4
7 4 5
9 6 5 1
5 8 9
2 7
5 3 1 6
6 1 3
Hard #2
4 5 9
9 2 1 7
2 7
2 9 1 6
4 1 7 3 9
9 6 5
3 1 4
7 3 5
4 1
Hard #3
9 8 7 5 2
2 1 9
3 8
6 5 3 7
4 1 9
3 8 2
5 8 3 1 4 6
6 5 4
Hard #4
4 6 3 7
4 6
5 6 2
1 8 2 3
4 9 5 1
2 8
8 2 5 4
4 3 7 9
6 9
Hard #5
8 4 6
2 3
5 9 8 3
4 2 9 7
3 1 9
5 7 4
8 5 9
3 5 1 4
1 7 3
Hard #6
9 3 7
2 9
6 3 5 4
1 2 8
5 2 6
6 3 7 5
9 4 1 3
8 9
6 4 5 7
Hard #7
9 6 3 2
5 2
7 3 5
6
7 1 3 9
9 6 8 5
2 3 5 7
7 9 1 8
3 8 9
Hard #8
5 3 6
9 5 4
2 8 9
4 2 7
7 1 4
6 9 1
8 7 1 9
4 9 2 5 7
8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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