Printable Hard Sudoku

Set mrq2wq. 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 2 1
2 6 7 1 9
5 7
6 4
9 8
3 8 2 1
8 1 4 3 9
9 5
9 5 2 1
Hard #2
4 2 8 7
9 1 5 7
8 5 2 1
8 9 5
6 2 7
4 2 5 6
3
6 2
1 8 7 5
Hard #3
3 2 1 7 5
4 9
1 3 4
4 9 5
8 5 1 2 3
7
7 9 6
8 7 6
9 3 2 4
Hard #4
6 7
5 6 4 8 3
7 3 5
3 4 5 9
7 5 6 8 4
6 4 7 2
5
9 2
3 4 8
Hard #5
7
5 6 2
9 8 6
2 9 8
8 3 9 7
9 6
2 5 1
7 9 1 3 5
4 1 5 8 9
Hard #6
9 7 6
8 3 9
4 2 7 1
7 9 4 5
4 9
8 4 2
5 8
3 5 1 6
7 1 3 9
Hard #7
6 5 9 1
7 5 9 3
9 7
3 4
1 2 6
4 5 8 6 9
8 6 9 7
4
5 3 2 8
Hard #8
3 4 6 8 9 2
9 4 1 6
7 2
8 3 9 6
9 6 7
4 7 3 5
5
3 4
2 3 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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