Printable Hard Sudoku

Set 14w2cf5. 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
8 1
8 6 9
1 8 6 4
2 6 5
6 9 1 2
1 4 3 9
6 3 7 9
1 4 5
8 7
Hard #2
5 8 9
1 7 4 2 8
6 7 9 5
7 2 1
6 8 3
6 3
4
5 4 9 6
9 8 2 1
Hard #3
3 9 8 1
6 5 9
4
9 4 1 6
8 2 3 1
5 3 9 7
5 2
8 1 6 3
1 9 7
Hard #4
4 1 2 5 6
5 8 3 7
9 2 4
4 2 1 7
6 2
8 7 3 1
1 9 3
8
8 1 6
Hard #5
5 9 6
6 1 4
2 3 8 4 5
4
6 1
8 7 1 3
2 5 3 9 6
8 5 4 3
4 7
Hard #6
5
4 5 2 1 9
8 6
4 1 7 5
8 4
1 7 2 9 3
9 2 8
5 9 8 2
1 5 3
Hard #7
9
2 4 3
6 3 1 7 8 9
8 1 4 3
3
8 2 7
1 9 5
7 6 5
5 8 4 9 2
Hard #8
9 8 5
7 6 8
1 2 9
1 7 8 5
6 4 7 3
4 8 1
4 9
8 7 1
3 2 4 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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