Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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