Printable Hard Sudoku

Set 2e8ygx. 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 3 6
3 6 4 5
7
9 2 1
8 5 9 2
1 6
6 1 5 3 9 2
7 1
2 3 7 5
Hard #2
7 6
8 5 6
7 9 3 4
6 9 1 5
4 9 8 7
1 2 9
3 6 2 7 9 8
4 5 6
Hard #3
5 9 3
8 3 5 2
1 6 7
8 3 6 9 5
9 4 1 6
5 3 7 8
1 7
3 2
2 5
Hard #4
4 7 5
8 2 6 1
5 4 9 7
7 8 9 5
4 8 5 6
6 8 2 9 7
2 9 1 6
3
Hard #5
1 8
6 4 2
7 3 1 5 8
2 6 7
5 9 7
2
7 4 9 8
2 1 8 6
5 1 9 2
Hard #6
4 5 9
2 9 5
9 6 2 4
5
5 8 3 7 4
7 4 6
8 3 6
5 4 7 1
1 9 3
Hard #7
5
1 7
9 3 1 4 2 7
8 2 5
2 8 5 1 6
7 6 4
8 7 5
4 9 2
9 3 4
Hard #8
1 7 4 8
3
2 3 1 9 5
7 1 2 3
6 3 5 2 4
7
4 8 1
9 4 8
9 6 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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