Printable Hard Sudoku

Set j795dp. 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 1 8 6
9 4
4 5 3 6
8 7 4
7 4 6 2
3 1 5 8
3
8 2 9
9 2 5 7
Hard #2
2 6 9 7 3
8 6 4
7
3 8
6 1 3
5 3 1 9 6
1 8 5
3 5 8 9
9 4 1
Hard #3
2 5 1 8
5 8 2 6 9
7 6 1 4 3
4 8 7
3 1 4
5
3
1 9 4
3 4 5 9
Hard #4
7 6
8 5 6 3
2 7 5 3
3 6 9 4 2
6 4 8
3 1
9 6
1 8 4 9
4 2 5
Hard #5
1 3 2 8 6 9
8 9 7
7 5 1
1 5
4 5 7
2 8
6 3 7 5 8
2 4 9
4 9
Hard #6
6 1 4
8 6
9 1 7
5 2 8 6
4 2 3 7
5 4
2 8 3 4
5 8 9
9 8 3 5
Hard #7
2 4 6
5 6 3 8
7 8 4 6
2 9 4 5
4 2
6 2 4
9 7 5 2
8 1 7
4 1
Hard #8
6 2 5
4 3 8 9 2
5 2 6 8
9 2 7
2 1 9 5 4
4 7
9 3 2 4
3 7
7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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