Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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