Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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