Printable Hard Sudoku

Set li5xja. 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
6 3 4 7 8
8 2
9 5 2
4 3 7
9 8
7 6 9
2 9
6 3 9 8 5 4
4 1 6
Hard #2
3 8
7 8 4 1 3
1 4 7 6
3 4 1 5 2
8 4 2
5 6 7
9
9 5 4
6 8 1
Hard #3
7 1
4 6 8
9 2 5 7
4 2 9
2 7 8
9 7 8 4
1 5 4 9
9 8
5 3 6 1
Hard #4
5 1 7 3
1 8
8 9 6 7 2
2 8 6
9 4
5 9 7
5 2 1 3
9 3 5
1 9 4
Hard #5
4 7 5
6 5
3
7 1 3
8 1 7 2
5 4
4 8 2 9
1 5 9 4 3 6 7 8
5 2
Hard #6
7 1 6
6 9
3 8 9 7 4 2
5
6 1 4 2
9 8 6 4
5 7 3
4 8 9 5
5 3
Hard #7
9 2 5
1 3
9 4 6
6 8 7
1 7 5 3
5 7 4 2
7 2 1 4 8
6
6 3 2 1
Hard #8
5 6 8
7 2
2 8 5 7 3
9 4 8 1
2 9
5 7 6
3 7 2
6 5 4
6 3 9 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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