Printable Hard Sudoku

Set d2na5y. 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
9 2 3
3 8 5
6 5 4 7
6 1 5 3 8
8 4
7 5
5 2 8 3 6
7 6 5 1 9
Hard #2
8 5 3 9 7
2 9
7 8 2
5 1
8 4 1 7 3 2
4 8
2 9 7
5 9
1 6 4 2
Hard #3
5 1 7 6 2 3 8
3 6 5
7 4 2
5 4
2 8 4
3 6 8
6 4 5 2
8 6
7 9
Hard #4
1 6 9
2
3 8
8 2 9 7 6 1
3 4 7
1 4 3
3 5 2 9
8 5 6 7 2
3 4
Hard #5
8 3 5 4
4 2 3
7 2 8
1 4 8
9 3 8
9 2
6 2 4 1
8 7 3 6
5 6 1
Hard #6
2 9 3
9 8 4 2
9 4
6 3 8 1
7 5 2
8 5 1 4
3 8 2
2 1 7
7 8 6
Hard #7
3 5 6 1 2
8 2 5
9 5 7
7 2 3
9 8 6
6 5 3
1 5 7 9 3
4
5 2 8
Hard #8
8 3
9 5 3 6 8
1 7 9
7 6 5
4 9
9 5 2
9 3 2 4 7
4 2 8 5 1
8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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