Printable Hard Sudoku

Set vlr7c0. 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 4 5
1 3 8 9
6 8
7 5 4
8 4 2 3
8 9 2
6 7 4 5 8
3 8 1
2 6
Hard #2
3 7 9
7 4 3 1 6 2
6 9
2 6 3
9 8
3 2 5 1
2 9 3 5
8
5 9 6 3
Hard #3
4 3 5 7
5 1 6
2 3 9 1
9 7 3
3 6 9 1
2
5 9 8 6
1 6 5 9
1 4
Hard #4
5 3 4 7
7 8 9
4 1 2 9
7 5 6 4
1 9 7
5 9
3 4 6
9 2 5
5 3 8
Hard #5
5 3 9 2
2 7 4 5 3
8 6 2
6 5
8 4 1 3 9 6
1
1 7
3 7
6 2 3 1
Hard #6
2 5 1 6
7 8 4 9 5
6 1
2 6 4 9
3 8 2
2 6 1
1 6 4
8 5 7
9 8
Hard #7
7
1 5 8 9
9 5 3
5 4 8 1
9 6 4 3 5
3 2 9
6 9 1 5
6 8
5 8 2
Hard #8
3 9 8
2 3 9
2 7 8 1
7 1 9
8 9 5 1
5 3
3 1 7 4 5
5 9 7
4 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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