Printable Hard Sudoku

Set 1hn9j59. 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 5 9 6
6 4
9 1
1 5 9
4 6 5
6 8 4 3 7
8 3 4 5
7
5 1 8 2 9
Hard #2
7 6 1 9
2 5 6
8 3 4
3 9 7
8 9 7 4
4 6 8 1
9 7 4
3 6
7 8 4
Hard #3
9 8 2
2 7 6
1 3
3 9 7 2
3
8 5 6 1 9
7 5 6 3 8
1 8 2
7 1 5
Hard #4
2 8
9 5 6 2 4
6 5 2 1
4 6 8
6 1 3
1 3
5 7 3 8
4 7
8 9 4 5
Hard #5
1 6
7 5 6
3 8 2 7
2 4 8
3 8 5 6
4 3 9 1
5 8
2 1
9 7 3 5 4
Hard #6
2 4 3 8
8 2 5
8 5 2 1 4
4 9 2
2 5 7
5 6 2 3
3
4 8 1
1 6 3
Hard #7
1 3
5 2 1 4
1 6 8 9 7
5 1 7 2
7 2 8 5
5 6
2 4 3
6 7
7 5 1
Hard #8
6 3
8 3 9 7 6
7 6 3 8
7 9 1 4
4 6 5
9 2
6 7 9 1
8 4 6
2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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