Printable Hard Sudoku

Set v596du. 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 8 5
6 9 1 4 3
1 5 3 6 4 7
3 2 1
7 6
1 6 7
8 6 3 5
5 9 3
Hard #2
7 1 6
4 7 3
5 2 6 9
4 9 2 5
8 2 6
7 4 8
2 7 4 6
5 6 9
8 7
Hard #3
6 8 9 2 7 4
5 6
8 6 9
7 4 1
5 2 8 7
8 2 9 4
1 5 6 3
3 2
9
Hard #4
9 4 3 7 5
1 5 9 2
7 5
5 7 1 4 2 9
8 5
4 3
6 9 7
2
8 1 9 4
Hard #5
3 6 5 7 9
7 1
9 4 3 6
6 8 1 2
7 9
1 9 4
9 2 6 8 4
6 9
7 3
Hard #6
9 5 4 1
6 3
8 5 7
3 4 5 2 8
6 8 7
2 9 5
7 4 9 2 1
2 4 7 3
Hard #7
3 9
3 1 9
9 6 7 5
5 3 4 6
6 3 2 9
2 4 1
6 3 8 4
7 8
8 9 5
Hard #8
3
1 4 5 3 7
5 4
9
2 5 9 8 3
4 6 7 2
2 8 5
5 3 9
5 2 1 8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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