Printable Hard Sudoku

Set c5xeuu. 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 7 5
9 2
6 1 2 3
2 1 9
3 5 8
5 1 8
5 4 8
1 7 8 3 5
8 6 4
Hard #2
1 2 3
3 5 1 4
4 9 6 8
5
3 2 6 7
8 3 9
9 6
2 5 4 7 1
2 5 9
Hard #3
9 3 7 2
4 5 1
4 3 9 6
4 5 6
6 9 1 3
2 7 8
9 8 5
4 3
9 8 5
Hard #4
2 8 6 1
5 8
5 1 2 6
7 2 1 6 5 4
3 9
7 1
1 6 9
7 4 2
8 5 3
Hard #5
3 6 5 9
6 8 2 3
9 1 2
5
2 6 9 3 5
7 2
7 4 1
5 3 6
6 7 1 9
Hard #6
2 4
4 7 5
3 9 8
2 5 7 6 1
1 8 2 5
3 7 2
6 1 7
7 6 8
9 7 4
Hard #7
1 6 4
6 5 9 2
2 5 9 6 7
4 9 3 6
5 7
8 9 3
1
4 7
9 5 8 4 2
Hard #8
4 3 7 2
8
1 4 3 5
5 4 6 7
5 1
4 2 8
3 8 7 9 2
4 3 9
4 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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