Printable Hard Sudoku

Set tycku9. 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
4 1
9 7 6 5
5 3
1 9 3 4 5 7
2 3
8 1 2
5 8
1 6 4 9
6 1 9 4
Hard #2
5 9 6
4
9 8 4 6
5 6 3
7 9
4 9 7 5 2
3 2 7 1
8 2 1 5 9
3 6
Hard #3
7 9 1 4
6 3
2 8 7
9 5 4 6
4 6
8 6 9 1
2 4 1 8
6 3 7 2
1 6
Hard #4
3
8 3 7 1
5 4 6 3 7
5 4 2 8 9
6 7 1 4
8 5
7 9 6 5
4 8
2 8
Hard #5
4 1 9
3 1 8
2 9 6 4 1
9 2 6
2 3 7 1
6 1 9
3 5 8
8
6 2 1 5
Hard #6
6 9 8 3
4 6 3 8
3 7 9 1
7 8 6
2 5 4 9
9 6 5
2 9
2 7 3 5
4
Hard #7
4 9 5
8 4 5 3
7 9 1 4 6
5 8 7 9
4 9
2 6 1
9 4
2 5 7
4 6 8
Hard #8
7 6
8 7 5 3
9 3 4
4 8
8 2 1 3
9 7 6 5
3 1 5 8
5 6 1 4
2 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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