Printable Hard Sudoku

Set 7v6dxp. 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
7 1 3 6
5 8
3 4 7
5 6 9
3 5 8 9
6 1 9 3 2 5
4 6
2 3 4
8 9
Hard #2
6 7
1 9 5 6 8 7
2 3 1
8 9 3 1
6 7
7 3 6
8 7
9 6 3
5 9 8 4
Hard #3
2
7 3 9
6 5 3
8 4 5
4 5 1 6 9
1 8
7 9 1 5 6
2 4 8 5 1
3 7
Hard #4
8 6
2 7 1
3 1 5 8
4 9 6 5
3 1 8
5 7 9
9 8
2 7 5
9 4 1 8 2
Hard #5
9 8 4 6
3 1
6 3 5 4
2 4 6 8
6 3 5 9
8 1
7 8 2
8 2 4 6
5 3
Hard #6
2 5 6 8
4 9 1 5 3
6
9 1 7 2
4 2 7 6
6 5 4 9
9 2
6 3
3 1 8
Hard #7
8 4 9
7
5 9 6
8 2 6
9 3 4
1 6 3 5 7
4 7 5 2
8 1 2 4
2 3 1
Hard #8
9 5 7
6 8 2 5 7 1
1 8 6
3 8 4 5
7
2 9
9 4 1 8
7 6 2 4
8 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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