Printable Hard Sudoku

Set bbs08f. 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
5 7 1
8 2 9 6 5 7
3 8
8 6 3
2 6 7 9
7 1
2 5 1 6
5 1
1 3 8
Hard #2
7 9 4 8 5
8 5 7
2 1 6
4 2 3
6 8 9 3 1
9 3 4
2 8
7 8
3 2 1
Hard #3
4 2
6 3 4 8 2
8 7
4 8 7 5
6 1 8
3 4 9 2
9 6 7
2 7 3 8
9 2
Hard #4
8 4 1
4 3 1 9 2
6 4
2 4
8 5 3 7
6 7 2
6 5 2 4
7 3 8
9 6 3
Hard #5
3 6
9 7 1
4 2 1
1 2 6 8 4
4 9 3 1
4 8
6 7
6 7 4 1 2
3 9 4
Hard #6
5 4 7 2
7 3 5
9 1
3 9 1 7
6 4
8 7 2 6 3
7 5
5 3 4
6 1 2 9
Hard #7
9 3
7 2 1
3 5 1 7
4 8
3 6
1 4 2 5 3
4 5 9 8
1 7 6
7 5 2 4
Hard #8
1 7 2 9 4
7 5
4 2 1
3 6 2 8
5 3 2
7 9
1 4 8
6 8 4 7
9 5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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