Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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