Printable Hard Sudoku

Set 1fz189q. 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 9
2 6 3 5 4
6 5 8 2
4 5
7 3
9 1 4
8 4 1
8 7 2
5 3 9 6 7
Hard #2
7 5 2
8 3 9 6 7
2 8 3
6 9 5 4
8 3
1 7
4 9 3 2 6
5 2
8 6 9
Hard #3
6 2 4
5 4 8 7
5 9 7
9 2
4
8 1 7 6 9
4 6 5 1 7 2
9 2 5 6
6
Hard #4
8 4
7 6
5 7 9 6 4 1 2
1 4 7 9 5
3 8
5 7 9 3
2 5 6 8
5 6
4
Hard #5
1 7 5
4 6
7 2 8 4 9
3 5 2 4
8 4 3
6 7
9 2
3 6 5 2 8
7 3 4
Hard #6
4 9 5
2 8 7 9
5 4
1 7 2
8 9 2 3
3 7 6 8 1 4
3 2 4
6 8
5 7
Hard #7
9
1 3 4 8 2
8 6 1
6 2 1 4 3
2 7
5 7 8
3 6 4 9
8 5
7 6 4 9
Hard #8
5 9 2 7
8 4 2
4 8 1 9 3
6 9 5 3
5
3 8 1
2 8
7 6
1 8 2 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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