Printable Hard Sudoku

Set 8ue2ru. 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 4 6 7
2 4
9 6 2 1
1 3 2
2
3 5 8 6
7 1 5 8
5 1 8 2 9
7 5
Hard #2
1 6 8
2 7
7 1 5 6 3
9 5 8
2 1 9 4 6 5
6
7 2
7 9 4 5
5 3 8
Hard #3
1 6 5 3
3 2
7 9 6
9 7
5 1 2
4 1 8
4 2
3 1 7 9 6
8 2 1 6 7
Hard #4
8
6 5 1 4
9 6 1
3 9 7 4 5 8
4
5 8 2 9 4
7 2 3
1 5 9
3 9 1
Hard #5
9 6 5 1 7
7 4 6
3 2
9 8 3 1
3 5 8
5 3 6
4 1 9 7 2
7 4 1
4
Hard #6
6 2 7 5 3
1 3 8
4 3 9
5 3 6
7 1
4 3 7
4 5 9
9 5 6 7 8
2 5
Hard #7
1 8
5 9 8
4 8 7
6 8 5
3 7 6
2 6 1
2 5 6 1 9
1 2 3
7 5 9 6
Hard #8
4 8 7
7 6 4
9 8 7 6
6 3 8 5 4
8 3
1 2
3 2 1
4 1 7 8
1 6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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