Printable Hard Sudoku

Set b2cq0c. 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 9 7
8 5
6 7
9 1 3 2
2 7 5
8 2 6
8 1 2 6
2 3 1
6 4 7 2 9
Hard #2
8 6 3 7
3 7 4
4 9 2 5
6 2 9 3 7 1
1 2
2 4
1 8 5 7
6
7 3 1
Hard #3
4 6 2 8
2 5 4
4 1 6
2 1 6
5 1 4 2
7 8
6 2 9 1
5 8 1
4 5 7
Hard #4
8 3
5 4 7 6
6 4
2 7 6 5
4 1 2 8
1 9 3
3 5 8
8 7 5 1
4 9 3
Hard #5
5 1
7 2 1
1 3 9 8 6
4 1 7 6 5 9
5 2
8 4 3
7
6 4
9 2 5 8 6
Hard #6
5 2 3 8
6 4 7 9
8 1 4
7 4 1
6 8 1
2 1 5 3
7
9 4 1 2
5 6 9
Hard #7
7 8 6
8 6 2 3
7 8
9 7
5 4 2
2 5 8
7 4 6 9
3 8 2 9 4
9 5 2
Hard #8
7 2 8
4 6 3
8
8 7 9
9 6 8 3
5 6
7 1 5 9
8 4 9 7 2 1
6 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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