Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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