Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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