Printable Hard Sudoku

Set 112pgum. 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 5 4
1 9
3 5 8 6 9
6 7 8 9 4
9 4 7 6
8 5
1 5 7
4 3 2
4 5
Hard #2
2
3 9 5 7 4 1
6 3 7 9 8
9 7
3 6 9 8
2 4 5
3 1
5 2 6
8 1 5
Hard #3
6 4
3 8
3 9 7 1
6 8 9
7 6 5 8 2 3
4 3 6 5
5 2 7 3 8
5
1 5
Hard #4
6
7 1 3 5
8 2 7
8 5 2
4 6 8 7
7 4 5 9 8
3 1 4
9 2 1
7 2 9
Hard #5
3 2 6
2 9 4 8
1 3 2
1 4 8 2
7 5 1
3 4 2 9
4 9
9 8 5
3 8 1
Hard #6
7 3 1 2
9 2 5 1 3
7 3 6
8 7 3 9 5
5 4
3 6 2
3 8 4
6
5 8 4
Hard #7
6 9 8 5
5 2 1
1 2
8 4 6
1 3 9 2
6
2 7
7 6 9 5 3
8 6 9 7 4
Hard #8
2 5
3 7 5
1 4 9 8 3
3 5 2 9
1 7 2
7 6
2 6
1 5 8 3
4 6 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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