Printable Hard Sudoku

Set gvd15z. 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
8 1 2 7
7 3
6 4 8
3 4 8
8 3 6
7 5
1 9 2 5 3
9 6 1 4
6 2 1
Hard #2
5 2 4 8 3 7
6 8 4 2
7
1 8 9
1 3
9 8 6 3 4
6 5
6 9 1 4
8 2
Hard #3
8 4 9 3
4
3 2
8 2 6 4
5 2 1 8
4 1 6 5
9 2 8 7 6
5 3 9 6
3
Hard #4
1 5 9 4 3
1
3 4 7 1
7 1 6 8 9
8 2
7 5 4
8 6
1 9 4 3
2 9 5
Hard #5
4 5
9 4 6
3 2 9
6 7 2
1 6 5 3 9
9 1 5
8 2 4 7
4 9 2
9 2 4
Hard #6
7 2 8 4 1
4 1 2 6
1 5 7
9 8
6 9
6 5 2
5 3 9 7 2
3 4
5 7 8
Hard #7
3 5 6 4
9 8 1 7
2 8 6 1 5
8 2
7
6 5 9 7
3 4 9
1 3 4 2
8 3
Hard #8
8 9 5
2 5 4 7
5 7 3 8 6
7 8 9
6 8
1 2 3
1 6 2 4 5
4 3 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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