Printable Hard Sudoku

Set vj0au3. 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
2 5
7 8 3
2 8 4
3 9 8 1
6 4 9
1 2 6 7
2 3 4
3 9 6 1
4 7 3
Hard #2
7 8 1 9
2 4
9 6 8
9 2 1
2 8 3 4 5 7
7 5 1
5 8
5 1 3
7 8 2
Hard #3
3 7 1
4 5 8
9 1 5 7
8 1
9 3 2 4
8 3 2
2 5 4 3
8 6
3 7 9 6
Hard #4
7 5 8 4
1
6 9 7 2
2 9 6
4 3 2 6 5 8
4 1 3
1 8
8 3 7
5 4 2
Hard #5
8 9 4
9 8 7 6
6 5
3 5 6 4 2 9
1 6 5
6 5 2 1
7 4
8 2
9 1 2
Hard #6
6 7 8
2 9 3 4 5 8 1
4 1 9 6 2
7 2 3
9 3
2 7 4
4 6
8 7
8 6
Hard #7
2 9 5
9 1 6
6 9 5 7 3
4 5 2 8
2 4 9
9 7 3 4
3 2 7
8 3
5 3
Hard #8
3 5 4 8 1
7 2 5
3 8
7 9
6
8 9 4 5
4 1 6 8
6 7 5 1
3 8 9 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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