Printable Hard Sudoku

Set vqb2xz. 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 2
3 4 7 5
1 9 7
9 5 6
6 7 2
1 3
1 5 8 2
5 4 7 6 3
8 4 9
Hard #2
1 6 7
3 9 8
1 7 6 2 5
9 6 4
8 3 4 5 1
2
7 8 9 6
1 5 3
2 7
Hard #3
3 2 9
9 6 7
6 4 9 3 1 5
9 6 4 8
7 6
5 3 4 9
2 8 3
6 8 1
4
Hard #4
7 2
3 9 8
9 8 4 1
7 6 2 8
4 1 5
7 5
4 3 6 9 7
1 5
9 6 4 5
Hard #5
3 8 2
5 4 6
6 2 4 9 3 5
7 4 8
8 6 1 4
5 7
7 3
9 6
2 3 4 9
Hard #6
9 2 8 1
7 1 3
7
1 9 6
4 3 9 8
4 1 2
5 8 7
4 2 7 1
5 7 9 6
Hard #7
2 7 9 4
8 6 7
9 7 3
2 8
3 5 9 2
6 4 7
9 2 7 5 3
7 4 3 5 1
Hard #8
2 4 3 5
9 3 1
7 8 2
4 2 1 5
2 3 1
5 6 7 4
8 9 5 6
9 3
1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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