Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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