Printable Hard Sudoku

Set 1yme8y1. 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 5 8
1 9 8
3 1 7
2 6 9 7
3 5 1 2
1 5 4
8 2
6 8 5
7 6 5
Hard #2
6 3 9
5 1 7 6
8 3 4 1 5
1 3 6
5 8
3 7 4
7 8 2
5 4
6 8 7 9
Hard #3
8 4 7
7 5 4 6
7 6 4
4 3 1 9 2
6 5 8 9
5 1 2 6
4 3 5
7 6 8
Hard #4
9 7 3 8
5 9 4
8 4 9 2
9 3 6
7 6
8 3 7 9
9 4 8
3 8 7
2 1 7
Hard #5
1
9 1 8 4 3
2 9 8
8 6 3
9 3
1 3 8
7 2 6 5
6 4 9 7
5 4 3 2
Hard #6
3 1
1 8 7 9
8 1
2 9 6
6 7
4 7 5 1 2 9
5 2
2 1 5 6 4
9 6 7
Hard #7
6 7 2
5 7 2 6 8
2 5 1
7 5 3 6
9 3 7 8
1 8 9
4 3
4 2
6 9 7
Hard #8
2 6 4 5
4 5 6 9
3
5 1 7
3 4 2 8 7
3
6 7 4 8 3
3 2 6
6 5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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