Printable Hard Sudoku

Set 1dq59gb. 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
2 8 1
7 4 9 2
5
6 8 9 4
5 1 2 9
4 9 5 3
4 7
9 3 6 8
3 1 2
Hard #2
9 1 6
8 4 7 9
6 9 2 1
4 8 7 6
4 5 7 8
9 1 5
5 9 3
2 7
4 7
Hard #3
1 4 6 8
2 5 1
7 3 2 9 5
7 3 9
5 1
4 7
5 2 8
7 6 1
9 1 5 4
Hard #4
7 4 2
5 3 1
1 9 7
2 5 4 8 6
6 9 7 1
6 2
7 2
5 3 9 6
8 7 6
Hard #5
3 1 5 8
8 1
7 6 4 3
9 3 1 8 7
6
1 8 5 6
2 1
3 5 9
7 8 3 9
Hard #6
1 5 3 7
3 8 2 5
9 6
7 8 2
1 5 8
9 7 1
3 1 4 7
6 7 8 3
1 6
Hard #7
3 8 6
6 9 7 1
5 2 8
1 5 4 8
4
8 2 9 3
2 9 5 6 8 7
5 7 4
8
Hard #8
3 7
7 6 3
2 8 7 6
2 7 1 4
9 1 6 3
8 1 2
7 5
1 8 3
7 3 2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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