Printable Hard Sudoku

Set 8uw1eq. 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
1 8 7 3
4 9
5 4
3 9 8 2
9 6 2 1
1 6 7 4
8 3 2
7
4 2 5 6 7
Hard #2
3 7 8 2
8 3 1
8 6 2 3
9 2 6 5 7
3 2
4 1 5
8 3
4 5
5 3 7 1
Hard #3
7 8 6
4 5
6 1 7 9
3 2 1 6
8 7 4 5
2 8
3 2 9
1 3 9
6 9 8 3
Hard #4
7 8 4
7 5 6 2 9
6 9 8
8 4 3 7 1
5 6 7 3
4 7 3
6 9 4 1
1 6
Hard #5
5 3 2 4
2 1
4 6 8 5 7 2
1 3 6
6 3 4
4 8
6 3 4
3 8 2
5 9 6
Hard #6
7 9 6 4 2
8 4 9 3
8 5
1 7
5 3 9
6 9 7
8 1 4
5 7 6
4 9 5 1
Hard #7
4 7 3
7 3 5 1
2 8 4 6
6
9 8 1 7 5
2 4 8 9
5 1
3 4 6 2
8 5
Hard #8
2 9 7 1 8 6
6 9 2 4 5
8 6 9 2 1
6 8 7
9 4 8
5 7 1
8 5 4 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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