Printable Hard Sudoku

Set 13cqydp. 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 4 3
5 7 8
7 2 3 1 5
8 5 2
1 3 5 9 6
4 8 3 5
4 1
6 4
2 9
Hard #2
2
3 8 6
1 9 7
9 8 7 2 5
5 9 7
6 4 9 1
6 9 3 8 1
4 2 5
7 9
Hard #3
7 3 1 8 4
7 6 3
3 9 1
3 8 9 6
1 8 5 3
5
6 2 8
4 9 6
6 9 1
Hard #4
4 6 8 7
8 3 2
2 4 1 3
6 8
2 6 1 8 3
9 5
5 6 7
7 2 9
3 5 8
Hard #5
6 2 7
9 1 4
2 8 6
5 7 8 6
1 9
4 7 8 6
9 1
6 3 1
3 4 5 8 9
Hard #6
2 9 4
5 2 8
1 9 7 3
2 9 7 3
8 4
5 7 1
6 7 9
7 8 9 6
9 4 2
Hard #7
1 4 9 6
7 2 1 8
7 1 4 6
5 4 7
2 9
9 3 2 8
8 4 6
3 2
4 1 5
Hard #8
6 8 5
8 7 4
8 3 7
1 4
2 8 9 1 3
6 9 4 8
1 9 2
7 6 3
9 4 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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