Printable Hard Sudoku

Set cdw7gq. 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 7 6
2 4 5
6 4
5
6 2 9 4 7
1 3 2
8 1 2 9 7
9 4 5 1
5 1 8
Hard #2
4 6 3 8
9 5 1 6
5 9 6
6 7
3 2 4
9 8 5 6
8
3 9 7 5 2
5 8 4
Hard #3
5 8
1 7 6
8 6 3 9 7
2 3 8 1
2 6
9 4 8
6 9
5 4 8 7
2 1 7 4
Hard #4
3
7 5 1 8
9 2
3 2 4 7
4 6 1 2 7 5
5 3 2 4
7 3
7 8 6 9
9 2
Hard #5
7 3 2 1 4
5 4 6
4 8
5 9 2 7
1 6 9
2 8
9 2
5 4 8 7 1
3 8 6
Hard #6
5
1 6 9
2 9 3 4 1 5
9 3 4
5 3 4 9
3 8
8 9 7 3
5 7 8 1
6 2
Hard #7
9 4 3
7 8 1
2 3
9 7
7 3 1 5 4
5 4
5 6 1
8 7 4 6 9
2 3 6 5
Hard #8
3 1 7 5
7 4 6 9 8
1 4 3
4 9 5 2
2 5 8
6
5 9 7 3
7 4 6
8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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