Printable Hard Sudoku

Set j8hphy. 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
3 4
8 6
7 2 9 4
4
9 6 8 5
2 8 7 3 9
3 8 1
2 6 3 5
5 7 6 9
Hard #2
6 9 8 7
4 5
5 2 9
2 9
6 3 9 4 7 2
8 5 3 1
5 2 9
8 2
1 6 4
Hard #3
2 4 7
5 9 1
6 5 1 7
6 7 3 5
6 1
3 1 6
5 9 6
3 7 2 4 5
6 3
Hard #4
9 3 5 1
7 8 9 2 5
4 3
1 8 4
3 7 2 8 6
3 1 9
1 6
5 4 1
4 8
Hard #5
7 9
1 3 8 5 2
6 8 7
8 4
4 6 3 2
8 7 3
8 4
5 2 8 9
3 7 6 5
Hard #6
9 5 2
9 7 1
1 6 8
8 5 4
4 2 9
2 1 6 3
7 5 9 2
1 2 8 3
9 7
Hard #7
4
2 4 5
7 5 3
1 9 7 8
7 4 9
4 7 9 3 1 2
5 7 3 6
8 1 6 2
2
Hard #8
2 7 5
6 8
7 6 4 1 2
7 8 9
3 6
9 4 2 3
5 8 1
9 2 8 7
2 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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