Printable Hard Sudoku

Set m3wuvo. 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
6
6 3 4 9
7 6
4
9 6 5
7 2 5 8 4
7 3 1 9 2
5 4 7 2 9
7 3 1
Hard #2
5 9 8
9 3
1 3
9 2 1
8 5 3 6 7
7 4
2 4 6 1
8 1 2 5 3 4
7 8
Hard #3
1 7 8 6
9 8 4 3
5
7 8 3 4
1 9 7
3 5 9
3 7 1 8
4 6 9 2 7
2
Hard #4
9 1 5
7 3 8 9 1
4 9 1
9 1 6 3
8 2 7
2 3 9 4
5 8
5 3
4 1 2
Hard #5
5 2 9 1
9 8 7 2
6 2 5 8
3 6 7
1 6 2
2 7 1
1 9 5 3
3
5 4 9
Hard #6
5 9
8 6 4 9 3
6 5
1 7 6
5 2 4 1
7 8 4
2 5 3 4
7 8 9
5 6 2
Hard #7
5 8 7
9 3 1
6 2 1 3 9
6 4 8
7 3 5 8
4 7 2
9 8 1 5
5
9 3 2
Hard #8
6 5 3 1
5
1 6 3
2 9
3 8
8 7 4 2
9 7 6
1 6 3 7 8
7 5 6 3 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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