Printable Hard Sudoku

Set w9bhr6. 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
2 7
7 4 8 2
6 9 8 7 3
9 3 4 5
7 3 8 1 4
8 2
9 6 5 7
8
1 4
Hard #2
3 1 7
8 4 1 2
5 4 9
8 5 4
6 2 3
4 1 3 5
5 7 3 2
4 9
6 9 3
Hard #3
1 6 7
8 5 9 4
3 7 6
3 9 6
2 5
5 4 3 1 2 8
5 1 9 7
8 4
1 3
Hard #4
1 4
5 6
8 2 9
2 4 3 9 8
3 6
6 8 1 3
7 6 2 5
6 7 8
1 5 3 4
Hard #5
5 8 6 7 1
4
8 1 5
2 5 3
1 8 2 7
7 3 2 6
3 6 7 8
4 7 6 1 5
Hard #6
5 3 7
1 7 4 5 2
8 2 3 9
1 5
3 9 6
6 2 4
8 1
7 2 6
6 8 5 3
Hard #7
7 4 5
5 6 7 1 4
9 4 5 8 7
8 5 1
1 7 3
2
1 9 2 3
4 6
3 2 5
Hard #8
1 4
8 1 6 4 5 9
9 8 3 1
8 2
7 2 8 9 1
5 1 2
4 7
6
7 9 2 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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