Printable Hard Sudoku

Set 1jf7qz9. 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
6 7 5
7 2 5
6 8 3
4 5 3
1 2 6
5 8 7 1
1 3
9 7 8
9 2 7 3 6
Hard #2
9 8 7 2 5
3 8
4 1 9
4 1 8 2
1 9 4 8
6 7
3 7
7 1 3 6
5 2 7
Hard #3
1 8 6 9
1 9 2
3 2 4
5 9 2 7
6 7 9 4
4 7 8
8 5
9 7
6 5 3 9
Hard #4
9 6 3 2
3 2 5 1
8 7
5 8 7
5 7 8
3 6
9 8 1 2 5
4 9 7
1 6 7
Hard #5
4 5 3 2
6 7 9 1 5
5 3 7
6 1 8
4 8 9
9 4 1 2
6 7 1
1 9
7 2
Hard #6
9 2
8 2 9
5 7 9
8 2 3 6
5 8 9
9 1 7 4
3
5 4 6 2 8 9
6 3 5
Hard #7
7 9 2 1
1 8 7 3 6
6 5 7
9 3 4
3 5 7 9
6 5
5 4 9
1 9 8
8 2
Hard #8
9 6 3 4
4 1 7
3 2 6
1 7 6 4 2 8
4 8 7 5
4 1 9
1 2 9 5 4
7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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