Printable Hard Sudoku

Set vvg8n7. 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
4 9 7 2
6
7 5 4 1
2
5 8 6 9 2
1 2 5 8 7
6 5 4
3 7
4 9 2 7
Hard #2
9
8 4 6 1
3 4
7 2 8
6 1 4
8 2 1 7
7 2 3 1 9
9 3 8 2 6
4 7
Hard #3
8 3 5 9
9 4 2 5 1
6 7 8
8 9 6
9 3 5 7
8
7 1 4 9 2
2 4 7 3
Hard #4
7 5 3 8 6
4
9 6 4
1 4 7
3 5 2
8 4 3 7 9 5
2
5 2 8
6 4 3 1
Hard #5
8 4 7
2 1 9 3
3 6 1 8
4 1 2
7 5 9
5 6 2
1 5 6
2 9 7 5
4 6
Hard #6
7 9 4
6 3 9
5 3 8 2
3 8 2 5
1 9 7
6 1
9 7 8
8 2 6 4
6 9 2
Hard #7
4 2 6 5
5 8
9 6
3 4 1
9 2 5
6 9 7
1 7 5 8 2
2 7 3 9
9 6 3
Hard #8
7 9
8 5 4 3
3 2 8 7 5
5 2 9 8
7
4 1 6
7 3 2
6 3
1 3 7 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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