Printable Hard Sudoku

Set 1w62umw. 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
8 9 5
9 2 7
4 6 1 7
7 1 3 6 4
7 4 3
8 7
1 5 7 2
6 3 4 9 5
Hard #2
2 8 6
3 4 9
3 2 5
1 6 3 4
7 4 2
5
8 4 6 3 1
5 7 1
6 1 2 5
Hard #3
7 5 6
3 2 6
1 9 2 5
8 5 1
9 3
5 6
1 2 7 9 8
5 4 1
3 1 8 4
Hard #4
4 1
7 3 6 1
7 3 2 8
2 8 9 3
4 6 7 5
1 6
5 9
7 8
1 2 3 5 7
Hard #5
1 5
9 5 2 4
5 7 4 6 3
6 4
1 6 5 8
2 5 8
6 2 8 4
1 9 7
5 8
Hard #6
6 9 7
5 9 4 6
4 8 1
8 4
3 1 8
7 5 6
3 4 8 2 5
1 6
9 7 2 4
Hard #7
8 5 4 2
6
1 7 8
5 4 7 3
4 7 3 2 8
6
2 7 8
1 5 3 7
7 6 2 5
Hard #8
8 4
2 3 8
5 9 3 1
8 2 7 1 4
6 3 9 4
9 8 6
1 2 8
4 9 6
7 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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