Printable Hard Sudoku

Set gu9bbq. 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 6 1 8
3
3 2 9 7
5 8 2 6
4 2 6 3 1
6 1 9 2 4
7 4 1
4 3
Hard #2
8 9 6 7 2 4 5
1
5 6
5 4 1
7 3 8
4
3 9 5 6
5 6 4 3 1
5 9 8
Hard #3
8 5
4 6 3 9
6
9 7 4 5 8
8 6 7
9 5 2
2 3 8 1
8 1 2 3 9
9 2
Hard #4
9 2
2 7 9 8
6 7 4
1 7 8 6
2 4 9 5 3
9 3 2
3 5 4
4 2 1 7
1
Hard #5
5 4 2 6
6 8
6 3 7
1 9 7 4 2
3 2 9 4 8 1
1
4 3 7
6 7 5
2 6
Hard #6
9 4
1 4 8 5 9
6 5 8
7 5 4 3
3 1 5
1 9 8
4 6 1
3 5 4
2 7 8
Hard #7
2 8 1 6
3 6 7 4 9
6 3
4 9 7 2 8
9
3 7 9 6
5 8 1 9
7 4
2 6
Hard #8
1 8 7 2
3 4 9 6
6 7
1 8 4 9 2
9 5 7
7 8 2 3
4 6
6 1 7 5 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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