Printable Hard Sudoku

Set wnk8wn. 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 3 9
4 7
2 6
5 9 1 2 3 6
8 3 9
1 6 9
8 7
9 3 2 5 7
8 2
Hard #2
2 6 7
5 2
3 9
9 1 7 8
7 4 2 9 1
2 4 5
9 4
8 9 6 2
3 7 5 9
Hard #3
7 2 9 3
4 7 2 5
8
6 2 4 5
9 7 3 4
5 3
3 9 1 6 5
8 3 1
8 2
Hard #4
6 7 3
5 9
9 2 8 5 1
1
3 6 5 7
7 4 1 8
8 9 7 4 6 1
2
7 4 5
Hard #5
8 4
7 3 9
5 9 1 7
9 1 8 7
4 5 2 6 1
6 5
3 9 2
7 2 4
8 2 9
Hard #6
7 8 1
5 6 9 3
6 5 7
6 8 4 1
4 1 5
3 4
2 8
3 8 5 6
9 5 3 2
Hard #7
4 2 7 9 1
8 4 6
1 9
8 4 1 2
3 1 7
9 3 6 1
5 8 4
8 4 7
3 6
Hard #8
7 9 1
8 2 6 9
2 1 5
3 5 9 8
1
7 6 8 4 3
5 2 8 3 7
4
3 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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