Printable Hard Sudoku

Set owmxr5. 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 3 1
4 8 3 2 7
7 2 1
2 4 9
4 5 1
5 3 2
9 8 4 6
6 2 7 5
Hard #2
6 5 8
1 2 3 4
4 3 2
8 1 2 7
3 8 1 6
9 5 7 8
2 4
9 7
7 5 1
Hard #3
1 4
1 4 9 6
5 3 1
8 3 7 2
5 6 4 9 8
4 2 3
9 7
2 5 7
7 2 1
Hard #4
1 8 5 3 7
6 8 1
5 8 1 9
6 3 1 4
4
7 8 6
1 3 4
6 8 7
4 1 2
Hard #5
2 1 6 3
8 6 7
4 3
8 9 4
8 6
6 7 2 4 8 5
5 4
6 4 7
7 3 9 2
Hard #6
7 2
8 9
3 5 1 9 2
8 6 5 7
1 8
6 9
4 6 2
5 9 4
9 2 3 4 7 8
Hard #7
8 6 5 9 1
9 6 8
5 7 4 8
1 2 7
3 2
8 7 4
8 3 5 6 9
9 7
4 3
Hard #8
8 7
5 8 7
6 3 4 1 2 5
4 8 5
9 1
5 7 2 6
1 6
1 4 5 2
7 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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