Printable Hard Sudoku

Set 1hyv7kd. 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
7 1 5 9 8
1 8 3 6 9 5
7 3 4 6
4 8 3
1 6 7
7 2
6 7 2
8 6
Hard #2
8 5 3
7 6 1
5 3 6 4 7
2 8 4 7
2 3 5
5 7 6
6 3
1 7
8 9 6 4
Hard #3
7 8 3 1
8 5 2 7
4 7 3 1 8
3 6 2
1 7 9
6
2 8 3
5 1 9
5 7 9
Hard #4
3 6
9 1 5 3 2
8 7 4
6 5 7 1
3 8 5
2
3 7 4 1
2 7 6 8
3 2 4
Hard #5
8 5 3 4
5 3
1 9
4 9 2
7 8 2 1
1 7 9
6 8 3 1 9
4 8 7
1 2 4
Hard #6
3 2 1
2 7 6 1
5 9
1 6 9 5
9 7
4 2 6 7
3 8 7 1
7 3
2 6 4 8
Hard #7
3
8 2 1 4
6 7 3
7 9 1 4
8 6
8 5 7 3
7 8 4
8 5 3 2
8 4 5 9
Hard #8
5 2 8 6
1 4
2 8 1
5 9 6 2
1 2 4 3
8 7 5 3
9 3
3 8 7
6 1 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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