Printable Hard Sudoku

Set 1kaz5ap. 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 7 9
4 3 5
7 1 6 3
3 9 1
9 2 3 7
8 4 2 9
8
1 3 2
1 8 2 6
Hard #2
7 3 6 5
3
5 4 1 2
8 1 2 3 9
5 9 8 2 7
9 7 4
3
4 6 1
7 8 2
Hard #3
6 8
3 1
2 5 6 9
2 7 6
6 8 1 7
9 2 5
6 7 9 5 1
4 7 8
1 9 5
Hard #4
5 3 4 2 6
5 9 4 1
4 8
1 4
3 8 9 6
1 4 7 2
2 7 5 4
4 7 6
8
Hard #5
8 5 7
9 3 2 6
2 1 7
5 6 1
7 5 6
2 4 8 9
9 1 4
7 8 3
4 3 9
Hard #6
5 2
3 2 7 9 8
1 5
8 1 6
1 8 2 4 3 9
9 5 6 3
9 6
8 9 1 2 7
Hard #7
2 9 5 6
6 4 7
1 9 8 2
7 6
8 5
7 1 8 3
6 8 3
8 4 7 9 1
1 3
Hard #8
2 8 4
1 7 8 5 9
9 3
2 1 9
9 5 8 1
6 7 2 3
3 2
2 9 7
7 8 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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