Printable Hard Sudoku

Set qwffz7. 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 1 5
5 3 4 8 2
2 1 7
8 7 4
5 2 7 9
6 9 2
1 6
3 5 4 1
8 9
Hard #2
6 4
8 2 1
1 3 6 8 4
5 1 9
3 1 8 4 7 2
5
9 7 5
5 4
2 1 7 5
Hard #3
3 8
8 2
5 9 6
3 8 7 6 1
1 5 3
7 1 5
4 3 5 9
3 1 7
7 6 9 4
Hard #4
1
6 7
5 6 4
4 6 8 9
7 8 3 2 5
3 7 6
3 1 8
8 1 4 5 7
9 8 6
Hard #5
9 6 1 4
7 1 5
4 7 6
2 7 5
9 4 5 3
2 8 6
4
5 6 9
2 8 6 9 4
Hard #6
9 5 2
3 1 9 4
1 8 2 5
2 8 4 6
1 2 7
9 4
1 9 7 2 8 5
4 9
6
Hard #7
8 6 7 4 5
1 8 3 2
5 9 1 8
1 9 8
4 5
6 4 8 7
5
3 4 6
3 7 4
Hard #8
7 2 3 5 4 6
8 1
3 5 4 2
4 9
1 3
2 3 6 5
4 1 8 6
5 7 1
7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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