Printable Hard Sudoku

Set lip5mb. 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
6 8 4 9 2
3 2 5 8
8 5
7 2 1
2 3 5 6
1 7
9 4 7
6 3 4
2 5 7
Hard #2
5
5 4 1 7 2 9
8 7
1 9 3
8 3 4 9
2 5 1
3 8 2 5
4 8 3 7
2 1
Hard #3
6 2 9
3 1 8 4
7 6 9 8
2 6 1
8 9 2
7 8 5
5 4 7
2 4
3 9 7 6
Hard #4
2 8 5
1 5 4
7 3 2
9 1 4 6 2
5 6 3 1 7
8 7
5
4 2
5 7 6 8 1
Hard #5
1 9 5
3 8 6 1
8
9 8 4
8 2 7 6
7 2 9
1 2 9
5 7 8 6
3 7 5 1
Hard #6
3 4
5 8
2 9 1 3 7
5 2 3 6
7 4
3 9 8 7 2
7 2 5 4 9
8 9
3 2
Hard #7
5 1 9 6 8
7 5
8 7
8 6 4 2
2 8 3 9
3 2 5
9 3 5 6
7 1 2
4 1
Hard #8
9 4 7 6
9 1 2 3
5 7 8 1
6 9 3 2
1 8 4 7
4 5
3 6
5 4
5 1 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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