Printable Hard Sudoku

Set d7vdcn. 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 8
9 6
7 5 2
6 1
2 7 4
5 2 9
6 3 2 1 5
5 1 7 9 2
8 4 1 7
Hard #2
4 6 2 9
8
1 8 5
7 6
3 2 6 5 4 1
1 5
7 2 4
7 2 4
4 5 1 9 3
Hard #3
4 7 9
9 2 5 4 3
6 9 3 5
7 2 8
4
4 2
8 4 6 3 9 7
9 8
3 1 6
Hard #4
1 9 8
8 4
5 4
2 5 1 7 3
3 2 1
7 1 9
3 6 7 9 1
6 5
7 9 2 6
Hard #5
6 1
1 2 5 7
6 9 2
5 2 6 3 8
4
6 7 8 1
7 2 1 5 3 4
3 9
3 7
Hard #6
6 7 8 1
2 4 8
9 4 7
3 1 7
9 8 4 5
1 7 6
7 2
8 3 9
3 8 6 7
Hard #7
1 8 3 9 7
6 1
4 7 8
8 2 3 7
7 4 1 8
5 6
2 6
9 8 3
1 3 5 4
Hard #8
4 3
6 8 5 4
7 1 8 2 5
1 5 9 4
7 9
6 4 8
5 4 2 1 9
9 4 2
8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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