Printable Hard Sudoku

Set 1nsv9yt. 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
5 9
5 7 6
7 6 4 2
2 8 7 5
5 3 7 2 6 8
4 9 1
6 7
3 2
6 5 3
Hard #2
7 9
6 9 1
6 8 1 2
5 2 4 6 7 3
9 7 4
4 8
9 8 5
4 2 7 6
8 9
Hard #3
6 4
8 7 9
1 3 9 8
3 5
9 5 7
6 7 8
2 3 6 4
2 3 1 6
7 4 5 3
Hard #4
8 3 2 7 6 1
1 6 4
1 5
7 8 3
9 5 4
3 5 4 6 2
2 5 1
8
4 8 7
Hard #5
8 5
6 5 4
4 7 9
9 3 1
7 2 6
2 1 6 5 3
6 7
5 3 7 8 1
2 8 3
Hard #6
6 5 7
8 9 6 4 1
3 4 9 5
2 6 4 8
5 6
1 8 4
4 3 9
6 1
1 2 7
Hard #7
1 4 6 2
6 7 5 4
8 1
2 3 6
4 9 7
9 2 5
7 9 5
4 1 7
9 6 3 8
Hard #8
8 3
2 5 9
1 5 2 8
6 9 4
8 3 4 1 5
2 5 6
6 7
4 8 5 7
5 8 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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