Printable Hard Sudoku

Set 1dvpi13. 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
2 4 3
6 9 3 4
4 3 6 2
6 1
9 1 2 8
8 2 5
8 6 5
1 3 9 7
7 2
Hard #2
4 6
5 7
3 6 9 8
9 8 6 7
2 1 3
3 1 7 8
2 4 8 5
4 9 3 7
3 6
Hard #3
2 4
9 6 8 3
8 7 2
1 3 6
7 3 9
6 9 8 1
5
6 5 7 3 1
8 7 6 4
Hard #4
6 7 4 3
4 2 8
8 7 9 6 4 2
5 9 1 4
1 7 5 3
2 5 7
6 5
3 2
1
Hard #5
7 5 4 1 9
9 2 5
4 6
8 7 9 5 4
9 1 2
1 3 8
1
4 8 6 3 7
3 2
Hard #6
4 3 6 5
3 7
7 3 5 2 6 9
2 4 1
9 5 7
6 9 7 8
9
3 1 2 4
8 1
Hard #7
4 2 3 6 5
7 9 1
1 6 8 7
8 2 3
9 3 8 4 6
4 9 8
5 3
2 4
6 5
Hard #8
7 6 5
2 1 5 8 9
5 2 6
6 8 1 5
4 5 2
7 5 4 9
6 2 8
3 7
9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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