Printable Hard Sudoku

Set 1ixn6qw. 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
6 9 4
3 1 4 8
4 6 3
8 5 3 7 6 4
9
4 3 8 5
6 3 7
1 5
1 3 2
Hard #2
5 2 8
9 1 4 3 7 6
2 5 6 9
1 2
7 9 3
2 7 4 1 8
4 9 5
1 6 4
Hard #3
8
4 1 7
2 4 9 8
7 8 2
1 9 5 2
5 3
8 3 1 5 2
2 7 5 6
1 4 9
Hard #4
4 7 5 2
1 4 6
3 7 9 2
8 3 4
1 3 6 7
5 9 4 3 2
5 4
9 6
2 7
Hard #5
5 4
3 7 6
7 8 4 2 5
9 6 4
2 4 1 9
1 7
3 6 1
3 8
8 9 2 1 5
Hard #6
6 5 4
9 8
5 1 2
4 9
7
9 3 5 1 7 8
3 9
5 9 4 1 3 6 7
6 2 4
Hard #7
3 5 7
6 5 3 4
7 2
8 1 6 2
2 1 9
1 7 2 6
5 4 1 3
5 7
4 7 9
Hard #8
2 6 8
7
1 8 7 2 4
3 5
4 6 5 7 1
4
7 3 8 9 2 6
5 2 1
8 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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