Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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