Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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