Printable Hard Sudoku

Set gc7zp6. 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 3 2 8 4
7 1 8
6 8 4 2
2 1 6 3
5 6 7
5 6 1 7
3
1 7 9 2 6
Hard #2
8
7 1 8 2
4 9 6 7
2 5 9 7 8
8 2 3
4 6 9
5 3 4
7 3 1
7 3 6
Hard #3
3 5 6
9 1
2 5 9 3 1
1 4 6 7
5 2 6
4 2 5 8
4 2
9 8
6 3 4 8
Hard #4
2 8
8 5 4 9 7
4 2 6 3
9 5 1 7
3 1
7 6 1 2 3
7 8 6
9 3 5 4
Hard #5
4 5 6
9 3 5
5 9 2 4 8
3 2
4 6 9 3
8
5 6
9 4 7 1
8 3 1 9 4
Hard #6
8 9
8 6 3
4 9 7 1 5
7 5
9 5 2 8 6
5 3 2
8 3 5 7
1 3 9
4 3
Hard #7
9 4
9 3 2
4 6 1 5
5 6 9 2
2 4 7 8
9 7 1 3
5 7 8
1 3 8 6
7
Hard #8
2 1 7
5 6 8 3 1
7
2 4 5 8
1 4
3 6 4 9
1 8 9 3
7 4 9
9 2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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