Printable Hard Sudoku

Set 7e0s2. 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
1 2 7 8
5 8
7 8 4 6 9
5 3 4 9
7 2 6
2 3 5
2 9
8 6 1 5 3
1
Hard #2
3 8 9
8 2 7 6 4
2 5 3
8 4 9
9 4 5
8 9 4 6
7 1 6
9 1
1 6 2
Hard #3
9 5 3
2 4 5
7 1 4 2
2 6
9 2 7 8
8 7 4
4 9 7 6
5 6 9
8 3 7
Hard #4
2 5
5 2 7
8 3 9 2
5 9 7 2 3
2
8 3 5 4
4 8 9 6
9 3
6 5 1 4
Hard #5
4 6 5 1
2 6 7
6 9
6 4 5
9 5 2 3
1 7
6 7 1 2 9
7 2 4 6
9 8
Hard #6
7 9 4
4
6 1 7 9
7 9 3 6 8
5 3 1 6
6 7
8 9 6 7
3 8 9 1
2 4
Hard #7
6 3 5 7
8 2 3
5 6
4 2 9
9 6 3 1 7
7 8
6 9 4 1
5 8 2
4 7 9
Hard #8
4 6 7
1 8
2 6 7 4 5
1 2 9
8 2 3
2 8 9
7 6 3 5
5 6
6 8 5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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