Printable Hard Sudoku

Set 1v1dilc. 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 2 6 5 3
6
3 2 4
9 1 4
8 9 3 6 7
8 1
8 4 5
3
6 1 9 7 2 8
Hard #2
4 9 3 8
9 4 3
2
8 3 4
2 9 3 7 8 6
6 9 2 1 7
4 7 9
3 5 8
6
Hard #3
6 8
5 1 2 4
9 4 1
3 2 6
4 8 3 1
1 6 5 8 3
3 9
6 4 7 5
6 1
Hard #4
7 6 9 1
3 1 4 6
8 7
2 7
9 8 5 4
9 3 6
5 7
4 7 5 2 3
1 4 5
Hard #5
4 2 5 3
6 7 3 8 4
3 6 1
1 7 8 5
7 6
3 4 9
2 4 3
8 3 2
1 7
Hard #6
5 4 9 6
1 3 4 2
1 9
9 2 3
5 3 7 8
9 6 5
7 3 5
4 8 7
4 6 5
Hard #7
4 7 1
5 1
7 2 6
4 2
5 8 2 3 1 7
7 9
3 1 2
5 6 3 4
8 4 5 7
Hard #8
1 6 2 5
4 6 1 7
5 2 3
9 8 1
4 5 9 2
6 4
1 9 8
8 3 5
4 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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