Printable Hard Sudoku

Set e3h0wx. 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
8 2 6
1 5 9 7
7 5 3 2 1
3 1 4
6 5 1
8
8 7
4 6 1 2 7
4 5 3
Hard #2
4 8 5 6 3 9
9 3 2
8
8 5 6 1 2
8 2
6 1 5
9 5
2 7 4 5 1
8 4
Hard #3
9 4
8 3 6
7 9 6 2
9 2 8 6
2 8 6
1 4 3 2
6 3 9 2
9 4 7
2 1
Hard #4
6
6 5 7
3 2 7 4 5 6
2 5 7 1
3 7
8 4 9 2
7 9 2
1 2
8 6 9 7
Hard #5
3 7 6 5
4 5 3 2 9
7 5 4
3 1 6 5
7 3 5 8
9 1
8
6 4 9
8 1 2
Hard #6
5 7 9
1 2 7 8
3 7 1
2
6 9 7
5 7 1 2
1 9 4 7
4 8 5 1
9 2 8
Hard #7
9 1 4 7 8
8 4
4 7 6 2
6 9 5
6 8 9
9 3 7 1
6 1
1 7 9 6 8
8
Hard #8
2 6 4
4 7 9 6
8 7 5
4 1 3
6 2
3 7 8
7 2 3 8 9
1 8
6 7 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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