Printable Hard Sudoku

Set zwj9t. 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
6 2 9 5 8
9 4
4 1 8 2
3 1 7 8
8 6 5 7
6 1
6 1
3 8 9
2 7 6
Hard #2
1 8 2 5
1 9
9 2 6 1 7
2 3 7 9 5
4 6 8
1 8 7
5 4
3 1
3 7 1
Hard #3
6 3 4
6 1 9
4 5 7 8
3 6 9 4 8
1 7
7 6 2 1
3 9 6 8
4
2 5 9
Hard #4
5 7 3 2 8
8 9 3
2 7 6
4 5 7
2 6 9
6 5 2 4
5 7
5 1
6 9 3 4
Hard #5
7 4 3
2 8 7
9 8 5 4
4 7
6 9 1 8
9 8 7 6
6
9 4 2 1 5 3
1 2
Hard #6
2 8 7
7 4 3 1 6
5 7 2
3 9 6 2
6 2 8
5
9 4 2 3 6
4
1 3 4 6
Hard #7
9 2 1 4
4 8 5
9 7
7
6 4 9 2 8
1 9
9 7 5 3
6 1 4
8 2 6 7 1
Hard #8
2 5 8 6
7 9
9 3
5 7 4 9 3 6
6 1
3 9 8
5 2
5 3 9 4
9 1 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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