Printable Hard Sudoku

Set 1qzuf41. 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 8 7
4
5 7 9
4 1 6 3
3 8 9 1
8 6 3
2 4 6
1 9
9 8 7 4 1 2
Hard #2
6 4 7 5 2
5 8 9 6
2 4 6
7 9 1
8 2 3 7 1 5
4
5
7 3 1 4
7 9
Hard #3
9 5 4
8 5 4 2 6
1 4 3 8
6 8 5
6 2
5 8 2 6
6 5 7 9
3
4 7 3
Hard #4
3 1
5 7
1 8 7 6 3 9
9 4 3 8 2
2 1 5
4 2 7 3
7 1 3 6
9 8 7
Hard #5
1 3 8
6 9 2
2 4 3 7 9
3 8
2 9 6 5
4 6 9
7 4
4 1 3
5 3 4 1
Hard #6
5 6 7 8
7 1 2 6
4 7 3
7 3 1 5
9 6 4
8 7
1 2 3
6 1 8 4 2
7
Hard #7
8 3 1
7 5
5 4 9 7 6 2
5 6 1 2 3
7 9 4 8
1
4 1 7 6
2 3 8 4
Hard #8
1 8 4 2
9 2 5 7
3 5 9 7
6 4 3 9
7 1 6 8
5 2
8 9 5 1 6
7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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