Printable Hard Sudoku

Set 1jb5ryo. 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 6 5 2
9 6
4 3
7 4 9 3 2
9 8 7
4 9
1 6 4
3 1 6
6 7 8 9 1
Hard #2
3 7 9
5 4 6 1 3
8 7 3 6
1 8 4 5
9 6 3
5 2 8
4 8 5
1
9 7 2
Hard #3
6 7 1
5 9 3 4
3 8 7 9
8 2 1
5 2
8 9 6
4 8 5 1
6 8
3 5 2 7
Hard #4
2 6 1
1 2 4
3 8
6 4 1 7
3 4 8 5
2 5 1
3 9 1
5 9 6
1 8 3 5
Hard #5
8 7 2 1
4 2
2 6 8
3 7 6 2
8 5 3
2 3 1
9 7
5 1 3 8
1 3 5 7
Hard #6
2 3 8
6 4 9 7
2 4
1 8 3 9 7
5 6 3
2 9 5 6
5 7 9
8 1 3
5 4
Hard #7
6 3 2
5 9
7 9 1
7 1 4 9
8 1
9 3 2
3 6
2 3 7 6
4 5 8 1 2 3
Hard #8
7 9 1 3
2 5 8 4
1 3
7 5
2 3 7 9
4
3 8 2
5 6 3 9 8
4 9 1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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