Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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