Printable Hard Sudoku

Set vdmes8. 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
3 5 4 1
1 5 7
1 8 2
9 7
3 4 5 1
2 9 4
2
8 7 6 1
7 6 3 4 9
Hard #2
8 5
7 4 8 6
8 1
5 2
4 7 9 2 6 1 3
3 4
8 5
6 2 3 8 7 9
7 5
Hard #3
7 6 9
3 2 9
5 9 8 7 6
2 1
2 3 4 1
8 3 9
5 8 4
4 7 1 8
2 7
Hard #4
7 5 4 9
3
8 7 2
3 7 9 2 4
4 1 9 6
2 7 8
1 9 2 8 6
6 9 7
4
Hard #5
5 7
8 7 4 5 1
8 4 2
9 2 4
3 6 7 9
9 3 8
2 3 9 6
1
7 9 2 3
Hard #6
1 4 2 8 6
7 2
9 5 7 3
3 8 6 5 9
1 9
8 2 7 9
3 9 1 8
3 1 6
Hard #7
5
9 7 2
7 9 5 4 8
5
5 1 3 8 2
2 1 6
7 8 6 2
2 5 7 4 3
4 6
Hard #8
8
1 4 7 3
9 1
3 8 5 1
6 4 7
5 9 6
4 6 7 2 1
8 1
7 3 8 2 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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