Printable Hard Sudoku

Set 6e6yla. 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 2 9
4 2 8
4 3 6 1
7 1 9
8 5
5 2 7 8
2 4 3
6 1 2
6 8 1 9
Hard #2
9 6 5 2 3
7 9 2 8
3 7 9
6 1
5 9 2 6
8 1
3
2 6 1
4 8 1 7 2
Hard #3
1 2 5 9 4
6 2
5 8
1 3 6 9
7 3 9
1
1 3 8 9 6
8 6 7 5
9 3 1
Hard #4
3 4
8 7
7 2 6
5 7 8 9
1 6 4
9 3 4 1 8
1 3 8 9
3 4
7 1 2 9
Hard #5
7 5 8
4 8 3
6 8 1 2
7 9 3 4
2 5 1 8
8 2 7
7 4 5 2
4 9
3 6
Hard #6
7 5 4 8 9
3
1 3 4 2 7
9 8 2 7
8 5 6 7 3
7 2 3 1
1
8 2 5 3
Hard #7
3 7 1 8
9 4
8 2
7 6 5 3
1 2
3 9 2 6
5 4 9 2 3
9
9 3 7 4 6
Hard #8
9
2 7 3 5
3 5 4 6
1 4 9 2
6 2 7 4
1 6 8 3
5 6 7 2 8
8 9 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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