Printable Hard Sudoku

Set q3wnuc. 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 2 3
6 5 1
1 8 6
7 2 6 5 8 9
5 1 2
3 8 1 4
9 7 8
4 9 6
7
Hard #2
3 2 8 1
8 6
7 6
3 2
6 3 5 1 2 8
1 7 8 5
4 5 2
2 9 1 8 4
7
Hard #3
4 5 7
8 9
5 7 8 3
9 3 1 8
6 8 4 1
2 5
9 5 6 3
6 8 4
1 7 5
Hard #4
9 8
1 3 5 6
9 2 3 7
5 4 6 8
6 2 8 1 3
9 8 5
3 4 8 6 1
8 2
Hard #5
4 5 2 8
8 4 9
3 4
4 8 1
8 1 2 4
7 2
6 8
1 6 7 9 3
4 9 5 6
Hard #6
7 3 9 8 5
1 5 6
3 2
6 4 1
5 7 9
9 8 5 2
3 8
7 5 1 2
8 1 9
Hard #7
5 7 4 6 2
4 8 9
8 3
6 7 1
2 9
4 3 2 1
2 7
1 5 9
8 7 6 9 4
Hard #8
3 9
5 6
8 7 3 2
3 4 1 6 8
1 7
4 8 1
8 6
7 1 2 4
2 3 7 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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