Printable Hard Sudoku

Set vy3e8s. 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 6 7 9
1
4 9
9 3 5
7 9
2 1 5 7
8 1 6 7 2 5
3 2 1
6 3 9 8
Hard #2
9 1 3
5 8
1 2
5 3 4 6
4 8 7 5
7 5 8 2
1
3 2 4 9 8
7 5 3 4
Hard #3
8 3 1 7
4 8
3
9 3 2 5 6
6 5 9 4 3
3 4 5 8
2 5
4 7 1 8
1 5
Hard #4
7 4 2 9
2 9 8
3
4 2
2 3 7 4
8 4 1 9
9 1 4 3
3 6 5 4 1
8 5
Hard #5
1 2 5
8 6 9 7
5 4
8 6 1 3
9 3 4 5
7 5
4 8
8 4 6 3
1 8 2 4
Hard #6
6 3 4
4 7 8 2
5 3 6
6 7 9
1 2 5 7
3 7 5 6
5 3 2
4 8
8 9 3
Hard #7
1 8 3
5 4 3
2 7 6 4
4 1 8
5 6
3 7 1 2
9 1 2 7
8 6 3 9
9 2
Hard #8
4 3 6 9 5
7 6
5 8 1
9 7 2
4 3 9
7 4 8
2 6 1
1 8 5 4
4 1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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