Printable Hard Sudoku

Set epj65a. 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
2 8
9 5 7 4
4 8 6
9 4 5 3
3 4 9 5
1 7
2 6 5 1 4
2
5 8 4 7
Hard #2
4
8 9 1 3
9 3 6 8
7 5 1
9 1 3 2
2
9 4 7 1
8 2 9 4 6
4 9 8
Hard #3
2 8
3 6 4
8 2
6 9 4
5 7
7 3 1 6
6 3 5 9
2 7 1 3 6
5 9 1 3
Hard #4
6 5 1 2
7 8 3
8 2 7 5
7 1 4
9 2
5 1 4 7
2 9 6 8 5
5 6 2
3
Hard #5
7 5 3 4
9 5
3 8
4 6 7 2
5 3 9 1
3
8 4 5 1
9 7 8 6
9 6 4 2
Hard #6
4
5 1 3 2
8 4 5 6 1
2 7
7 9 1 8 5
4 1
6 9 7 4
1 9
3 7 1 8
Hard #7
6 3 8
7 1 9
4 1
1 9 2 4
6 7
5 4 3 9
9 2 5 1
1 5 6 4 9
3 2
Hard #8
9 8 7 2
7 1
4 9
3 2 6 4 9
6 2 4 8 3
1 2
9 5 7
5 6
1 9 5 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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