Printable Hard Sudoku

Set wiz0pr. 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
2 6 8 1 7
1 9 6 2
3 2 7
7 5
8 6 1
5 4 6 8
4 6 2 5
7 9 8
4
Hard #2
7 8 4 9
5 2 9
3 9 6
8 9 5 3
6 1 5 4 9
4 8 2
1
1 7 3
9 3 7
Hard #3
9 2
7 4 1 2 3 8
9 5 6
1 6 2
9 3 4
4 3 8
1 8 3 2
2 8 7
5 9
Hard #4
1 9
3 7 1 5
7 6 5 3
8 9 2
7 4
9 3 6 5
1 2 3
4 8 9
8 6 7 1
Hard #5
5 4
6 7 8 1 2
1 4 6 3
4 2
7 5
9 1 2 3 8
8 6
5 7 1
9 3 6 4
Hard #6
3 1 6
1 2 9
4 9 7
9 2
5 1 4
6 7 5 8
2 4 1 3 5
1 7 9 8
2 8
Hard #7
9 7 1
4 1 3
7 3 6
1 3 8 7
4 2 9
1 2 9 6
7 3 8
1 2 3 5
7 5
Hard #8
3 1 2
9 7
4 1 2 3
8 2 7 3 9
5 8
9 8 1 7 5
8 2 4
7 5 9
9 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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