Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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