Printable Hard Sudoku

Set 1ux5w0j. 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 9 6 4
2 5
6 3 2
7 5
9 6 3 8
5 2 1 3
4 9
8 5 6
7 2 9 5
Hard #2
8 1 9 4
5 1
2 1 7
1 9 5 6 2
5 8
2 9 3 5
1 7 4
6 3 2 7
6 3
Hard #3
6 5 8
6 4 7
9 2
9 1 7
1 7 2
1 5 3
3 6 1
5 7 2 6
8 4 2 3 5
Hard #4
9 7 3
4 8 1 7 9
2 8 6 4
6 5 8
8 2 5 7
1 4
7 2 1
8 7
5 9 3
Hard #5
9 3 2 5
6 4 3
7 8 3 2
1 3 4
1
3 2 6 5 7
2 7 6
6 7 4 8 3
5
Hard #6
2 5 7 4 9
5 3
4 6 3 9 7
7 1 6 9
4 1 5
4 1
6 3 8 2
7 8
4 7
Hard #7
3 5 8 7 9
9 2 4 6 8
5 3 7 6 1 2
9 2
2 7 6 3
5
4 1
1 3 7 6
Hard #8
9 7 3 2 4
8 5 9
6 3 4 7
6 8 7
9 6 4
1 5 6
2 5 9 4
1 5
2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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