Printable Hard Sudoku

Set qaj9xv. 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 4 2
9 6 1
1 8 2 4
1 3 5
7 4 9 8
4 6 5
7 5 2
9 7 3
5 7
Hard #2
6 4 3 2
9 2 3 4 8 1
2 6
2 1 3 7 8
6 3
2 1 5
3 1 5
2 9
7 1
Hard #3
2 5 8
3
1 6 9 7 3 4 5
6 8
4 3 8 9
1 2 7
6 8
5 9 7 6
7 4 2
Hard #4
3 5 6 7
5 4 8
4 6
7 5 2
6 9 8
6 4 1
8 5 9 3
1 8 4
2 9 7 3
Hard #5
1
3 5 8
2 4 5 3
8 2
9 1 4 7 6
8 7 4
4 8 6 1
3 9 8
6 5 1 3
Hard #6
1 5
2 9 1 6
4 9 7
1 2 8 9 4
3 8 1
5 8 9
4 7 9
6 5 7 2
9 4
Hard #7
4 9
3 2 8 4
5 3 6 1
2 4 8 9 7
1 9 4
1 6 8
6 9 8
8 5
1 4 7
Hard #8
1
1 2 7 4 5
2 6 3
8 4 3 7
9 6 4 8
5 9 8
8 1 9 3
3 7 2
7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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