Printable Hard Sudoku

Set fvui1. 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 5 9
9 4 1 8
8 1 5
9 5 6 4
3 1
6 2 9
2 8 4
7 9 6 5 2
5 7
Hard #2
3 4 6 1
9 2 1 3 8 5
4 1
5 9 8 4 2
2 8 1 9 4
5 1 2
2 3
8 7
Hard #3
9 2 6
8 6
6 2 4 5 7
8 3 6
3 9
5 2
3 9 4
7 4 6 8
6 8 3 1 7
Hard #4
3 8 7 1 2
6 3 7 9
9 2 6
4 7
6 3
7 2 6 5 3
1
6 1
8 9 5 7 2
Hard #5
8 9 5
4
6 5 7
5 2 9 6 3
1 9
3 4 2
5 2 3 7 4
3 9 5 1 7
1 9
Hard #6
7 1 4 3
8 9 7 6 1
6 8
3 6 5
8 4 7 6 9
9 5
9 3 2 1 8
6 5 9
Hard #7
7 5 4 9 1
5 1 3 7
8 3 4
2 5 1 9 7
4 2 3
6
8 5
1 9 3
1 6 2
Hard #8
3 9 7 5
9 3 5
8 4
7
7 9 5 4 6
3 2 9 1
6 2
8 3 1
1 7 8 3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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