Printable Hard Sudoku

Set 1x0m8q9. 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 9 4
3 5 7
1 4 5
4 1 3
6 5 8 7
5 7 4 2
2 5 4
1 9 8
9 3 6
Hard #2
4 8 6
1 2 9
8 9 1
6 4 7 8 9
3 1
7 9 1 2
3 4 8 7
1 6
8 5 4
Hard #3
9 8 7
8 5
7 3 5 6
1 7 2
6 4 5
9 5 1 4
1 6 2
1 2 4 6
8 9 4
Hard #4
6 5
7 4 6
5 8 3 4 1
8 5 3 4
4 6 5 1 8
8 5 9 4
2 9 6
8 1 2
Hard #5
1 5 6 7
8 4 9
6 7 5
6 7 5
1 6 4 5
2
2 7 1 3
8 4 5 7
1 3 9
Hard #6
3 4 9 6
4 7 1 2
5 7
4 3 7
9 5 1
5 7 6
8 2 1 7
6 2 3
1 4 7
Hard #7
3 2 5 6
1 9 3 7
9 1 4 3 2 6
3 2 6
7 8 9
8 5 2
1 8 4
4 7 1
Hard #8
7 9 3
3 2 5 8 1
1 5 6 3 7
7 1 5 3
4 9 6
5
8 9 4
9 7 6
1 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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