Printable Hard Sudoku

Set m8qhkr. 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
4 5
2 4 8 3 9
9 6 1
4 7 5 9
9 2 3
3 6 1
2 3
1 8 2
7 8 6 2
Hard #2
7 5
5 8 4 6
4 2 9
3 8 1
6 4 5
1 2 3 5 6
4 6 1
2 5 3 4 7
8
Hard #3
9 4 3
6 5 2 4
4 3 1
8 5 9 1
4 7 3 6 2
3 9
2 8 4
1 9 6
5 7
Hard #4
2 3 5 7
3 6 2
9 2 5
4
5 9 7 6 4
5 3 9 1
3 8
8 7 5 3
2 4 7
Hard #5
4 2 7
1 9 6
6 1 7
4 6 3
9 8 6
5 9 1 4
2 7 3
7 3 1
8 5 6 2
Hard #6
1 3 6 9
2 9 7 3
9 2
7 1
9 6 7 3
8 2
5
6 4 1 5
5 6 3 8 7 9
Hard #7
5 8 3 6
9 5
3 4 2
2 1 7 6
7 1 6 9 4
6 3 7 9
2 1
5 8 7
1 6
Hard #8
6 9 2 4
1 4
2 1 3 7 5
5 6 1 9
3 5 8 1
4
4 6
3 1
6 5 2 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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