Printable Hard Sudoku

Set 1xjoop5. 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 7 8
2 9 3 4 5 8 1
4 1 9 6 2
7 2 3
9 3
2 7 4
4 6
8 7
8 6
Hard #2
2 9 5
9 1 6
6 9 5 7 3
4 5 2 8
2 4 9
9 7 3 4
3 2 7
8 3
5 3
Hard #3
3 5 4 8 1
7 2 5
3 8
7 9
6
8 9 4 5
4 1 6 8
6 7 5 1
3 8 9 2
Hard #4
8 4
6 1 4 3 7
5 2 1
3 9 6 1
1 8 4 6
2 7
3 6
2 7 6 3
6 7 5
Hard #5
4 7 1 8
9 3
5 1 8 2 3
5 8 9 7
8 2
1 5
7 8 1
6 5 9 4
4 1 6
Hard #6
7 2 4 6
8 2 4
1 6 8 9
1 8 7 4
4 8 3
5 8 1
6 7 9 2
1 3 5
6
Hard #7
1 6 8 3 7
8 7 6
5
5 3 7 4
9 4 2
6
8 6 5
5 4 8 7 2
3 2 1 5
Hard #8
7 3 6 9
6
3 4 5 8 6
2 1 4 9
2 8 5 1
5 4
7 9
4 8 9 3
7 1 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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