Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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