Printable Hard Sudoku

Set 1dq5va7. 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 5 2
4 1 7 9
4 1
1 3 6
6
3 8 2 5 1 9
4 2 6
3 7 1 4
1 9 5
Hard #2
1 9
8 4 7 1 6
9 6 2 5
6
6 7 3 1
2 1 4 7 3
9 8
6 5 2
3 2 8
Hard #3
8 4
7 4 9 2
6 3 4 5
8 9
5 1 3
3 9 8 7 5 1
5 9
2 8 7 6
6 4
Hard #4
3 9
8 3
8 3 1 7 6
9 8 2
2 4 8 6
5
4 9 2 1 7 6
5 1 4
8 2 5
Hard #5
2 9 4 8 6
3 1
8 1 3 5
2 1
2 4
6 3 8
8 9 6 7
4 1 2 9
5 4 8
Hard #6
5 3
6 1 5 2
6 9 1
9 8 6 7 2
6 4 9 1 3
5 1
3 4 8 6
9 4
7 5
Hard #7
4 9
5 9 1 7
9 4 3 6
4
3 6 9 7
9 1 7
6 5 2
4 3 8
5 1 9 3 2
Hard #8
6 4 7 9
8 6 7
7 1 9
2 3 9 5
3 1
6 5 8 3 4
1 8 2
4 6 5 9
7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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