Printable Hard Sudoku

Set t3v9ga. 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 7 5
5 1
7 3 6 1
1 4
2
6 2 7 8 5 9
7 3 9
5 6 7
1 6 7 3 4
Hard #2
5 7 4
4 3 7
6
3 2 8 7 9
9 7 5 8
3 6
7 8 1 6 3
8 2 3
9 1 4
Hard #3
5 7
6 9 7 1 3
3 2
6 9 7
2 7 3 1 4
8 7 4
3 5
9 1 3
5 6 8 1
Hard #4
2 4 6 7
7 4
8 2 6
2 1 3
1 9 3 8
6 7 8
7 9 5 1 2
4 9 5
3 6
Hard #5
3 7 4 8
9 6 5
6 3
7 2 6
1 5
6 7 1 8
8 6 9 4
3 7 1
6 4 1 3
Hard #6
3
2 3 7 8
5 7 2
3 2 9 1 5
7 5 4
1 8 9 4
7 8 4
6 7
1 8 5 2
Hard #7
6 8 3
2 1 4 7
1 5 2 9
9 8 7
7 1
6 9 5 1
3 7
2 7
8 6 3 9 2
Hard #8
8
7 5 9 8 2
9 5 1 3
8 1
5 4 7 3
6 2 7 5
2 7 8 4
1 6
7 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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