Printable Hard Sudoku

Set 1qg5x9u. 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
7 5 2 4
3 6 7
2 9 8
8 7 5 9
1 9 4 3
4 9
4 7 2 1
3 9 4
8 2
Hard #2
3 9 4
4 7 2 6
1 8 5 7 3
6 3 8
9 4 1 5
2
3 7
8 2 6 5
5 9 2
Hard #3
5 1 9 8
9 8 4 2
4 6 2 1 3
5 1 7 8
2 4
8
3 5 7
1 3 6
4 5 1
Hard #4
9
4 1 8 3
3 8 9 2
1 4 3 2 8
2 6 8 7 4
1 5
8 5
1 7
7 2 8 9
Hard #5
6 7 9
9 2 1
8 9 2
4 8
4 6 1
6 8 9 3
7 6 4
9 2 7 6 1
5 8 7
Hard #6
3 6 1 2
1 3 8 5
4 2 9 7
5 9 7
7 2
3 8 6
1 9 7 2
5
5 3 9 4
Hard #7
7 4 6
1 9 2 4
8 4 5 3 6
7 3 9
1 3
3 5
5 8 3 2 1
5 4
6 7 2
Hard #8
8 3 1 9
5 6 3 1 4
7 2 8 5
5 1
6 4
7 3
5 1 4 9
7 5
4 3 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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