Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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