Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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