Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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