Printable Hard Sudoku

Set 88xvk1. 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
9 7 3 6
8 7
3 4 9 5
4 7 9 1
1 4 8 6
5 4
5 8 6 7
4 7 8 9 2
Hard #2
1 8 2
4 6 9 1
2 8 5 4
5 2 3
7
1 9 7
8 9 6 4
3 9
7 3 9 8 1
Hard #3
1 6 4 8
5
9 8 6 7
6 5 2 4
7 9 5 6
3 8 1
6 2 3
9 3 7
5 9 8
Hard #4
8
3 7 8 1
9 2 1 7
6 5 8
1 9 6
8 7 9
7 9 4 1 5
3 4
6 3 7 2
Hard #5
2 1
9 1 3
6 7 3 5
2 8 6 5 9
2 7
3 2
6 5 2 9 1
7 1 9 5 4 8
Hard #6
7 1 2 6
7 9 1
5 8 2 7
7 8 5
5 9 1 8
8 6
3 5 4
2 1 5 9 8
3
Hard #7
5 6 8 9
9 8 4 6 5
5
6 4
3 8 4 6
8 9 7 5
7 6 3
2 9 4
3 5 1
Hard #8
6 5 9 4
4 3 8 7
6 9
5 6 4 1
9 3 8 1 7
7 6
8 2 5
3 7 6
8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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