Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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