Printable Hard Sudoku

Set gpx3qo. 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
5 9 3 8
4 7
6 5
7 2
1 4 2
9 2 7 6
3 9 8 4 1
1 8 7 6 9
9 1
Hard #2
5 2 9 3
2 7
6 8 7 9 2
4 3 5 2
9
5 7 1 4
5 3 4 1 7
7 2
6 4
Hard #3
1 4
2 8 1
7 2 9
6 7 3
5 9 7 8 2
4 7 5
2 7 3
7 9
9 5 8 3 7
Hard #4
5 9 6 1
1 5
1 2 8 9 7
2 9 1 5 8 3
4 2 7 6
6 7
7 1 3
1 8 2
Hard #5
9
4 3 7 5
9 8 4 1 5
6 1 2 3
8 5 4 2
1 9 8
7 1 2
9 2 5 8 3
Hard #6
5 6 2 3
1 2 7 6 9
1 9 5
3 6 1 7
5 1 6
2
7 4 5
8 3
2 4 9 8
Hard #7
3 1
9 2 7 3 4
4 5 6 8
3 9 5 7 4
1 2 9
5 7
2
9 5 3 8
6 2 3
Hard #8
6 4 8 3
7 1
6 7 5
7 9 2 1
8 6
2 8 3
5 7
1 3 2 7 4 6
7 8 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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