Printable Hard Sudoku

Set 1a2ppfq. 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 7
9 5 8
1 7 5 4
4 6
4 1 3
3 4
6 5 7 2 9
5 8 1
2 1 5
Hard #2
9 4 7
1 2 5 4
6 1 9
3 7 8
8 3 2
6 1
9 8 7 4
6 1 5 7
2 7 5
Hard #3
3 5 6 4 2 8
7 1 2
1 6 5
7 2 9 6 1 4
7 5
9 8 6 7
9 8 3
3 8
Hard #4
2 6 7 3
9 5
1 4
3 5 7 1 8
5 8 4 9 7
4
7 6 4 2
5 7 8 1
3 4
Hard #5
6
5 1 4 2 7
7 5 9 8
6 1
5 8 4 9
2 7 6
4 1 2 6
6 1 5 9
3 6
Hard #6
4 8 1 3
4 9 5
6 9 4
6 8 2 9
9 2
3 5 8 1
8 2 5 4 6
1 9
5 3
Hard #7
3 8
6
5 9 8 2
2 3 5 1 4
6 4 7 9 1
1 6 3
9 6 1 2 3
4
5 2 6
Hard #8
1 7 6 5
7 5
3 1 2
1 6 2 9 3
4 2
5 3 1
9 6 1 5 8
3 8 4 7
3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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