Printable Hard Sudoku

Set qylx9o. 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 5 3
8 5
1 5 9 6 7
1 2 5 8
1 2
6 2 7 8 1
6 1 3 8
8 4
4 6
Hard #2
8 1
5 4
3 5 7
8 2 5 3
7 6 9
4 6 2 7 8 1
5 8 1
4 6
4 8 9 2
Hard #3
8 9 6 3
2 1 8
3 6 8 1 7
1 7 9
9 4 8 2
5 4 6
2 7 1
1 5
5 9
Hard #4
3 2
4 6 7 3
2 1 9
3 4 7
1 6 4 5
7 5 1
2 6 8
5 9 4
4 1 5 7
Hard #5
8 1 9
4 1 9 7
2 4 9 1
5 3 6 8 7
1 8 2
8 7 5
8 6
2 6 9 5
3
Hard #6
2 3
6
4 8 5 7 9 2
2 5 8 3
8 6 2 4
9 8 1
6 1 8
9 7 5
5 7 1
Hard #7
9 4 2
2 8 1 9
3 9 1 2
1 7 5 9
7 3 9 6
3 7 4
2 5 7 8
8 4 1
Hard #8
4 8 2
2 3 6 7 5 4
8 3 7
4 3 2
7 8
3 6 2
1 4 5 3
6 8 7
5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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