Printable Hard Sudoku

Set 1szv6vt. 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
6 8 2 4 1
2 5 1
3 6 9
2 1
8 5
8 9 4 5
8 2 3 6
3 2 8 5
2 8
Hard #2
9 8 3 4
5 2 8
3 8 6
5 2 6 8
3 2 5
7 1
6 2 9 3
7 1 4
5 6 1
Hard #3
3 8
4
2 7 8 3
3 1 7
1 9 7
5 2 9
6 2 4 3
9 3 5 1 6
6 2 9 5
Hard #4
1 5 9 2
4
3 5 7
5 3 1 4
7 6 8
4 9 7 2 3
6 5 1
7 9 8
2 3 5
Hard #5
9 7 8 5
1 8 6 9 7
2
4 2
7 4 3 9
7 1 4
8 9 3 5
5 2 3 1
8 2
Hard #6
2 7 5
8 3 6 7
7 2 8 3
8 3 5
1 4 5
6 1 3
1 5 4
2 3
6 4 7 1
Hard #7
6 1 7
8
1 9 7 5 4 6
5 1 6
8 3 4
4 9 3
4 3 1 9 6
2 7 8
8 6
Hard #8
1 8 9 7
3 1 9 2
7 2 4 5
3 6
9 4 1
1 5
6 5 2
3 6 1 8
8 6 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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