Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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