Printable Hard Sudoku

Set ly8rvb. 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
7 8 2 3 6
2 9 8
6 4 7 9
2 6 3
7 5 9
3 9 2 6
4 3 6 7
1 8
2
Hard #2
8
2 1 9
9 7 6 1 5
7 4 6
9 1 5 2
7 9 8
1 9 4
3 5 8 9
8 3 6
Hard #3
1 2 4 3
5 4 9 1 2
2 3
7 5 9
7 1
8 1 5
4 6 2 9
9 6 1
1 7 6
Hard #4
7 6 9 8
9 8 5
1 5 3 4
6
3 8 9
6 3 2 9 4
9 4 7
2 4 7 8
6 1
Hard #5
1
6 8
1 4 3 2
6 9 2
2 8
2 4 8 1 6 9
8 6 3 4
9 2 1 7
3 2 9
Hard #6
5 3 1
9
7 4 1 8
8
5 8 6 4
3 4 9 6
9 5 8
7 6 4 2 5
6 3 2 7
Hard #7
6 8 7 9 2
1
5 8 3
2 1 8 4
6
3 4 1 2 7
4 7 3 5 9
2 8 3
7 2
Hard #8
2 6 9
3 8
6 9
9 5 3 6
1 4 5 9 2
7 5
4 1 2 8
3 2 7
2 4 5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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