Printable Hard Sudoku

Set w9ydss. 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 4
2 4 6 1
4
5 9 1
1 9
5 8 2 7
8 3 5 2
5 8 6
9 7 8 2 1
Hard #2
2 9
3 4 2 8
7 8 4 2
5 7 9
1 7 3 9
8 4 6
3 5
8 2 6
2 7 1 5
Hard #3
6 1 2 4
6 7
5 3 4 8 6
1 4 5 3 2
5 4 9
7 8
8 1 5
2 4 9
4 8
Hard #4
8 7 4
7 5 1
3 5 2 6
7 1 6 5
3 2 1
1 7 3 4
7 3 8
6 9
8 5 6
Hard #5
5 4 2 8
6
1 7 3 4 6
3 9 2 5
6 8
2 7 9
4 8 2
6 4 3
6 7 1 9
Hard #6
7 6 8
5 4 1
4 8 2
3 4 6
1 3 5
9 1 7
8 6 2 9
2 5 8
2 5 3 6
Hard #7
2 3
3 8 1 7 9 2
7 6 1 9
9 1 6
5 1
6 8 9
5 7 3
2 8
8 3 4 1
Hard #8
6
6 3 7 1
1 2 9 8 3
3 1 2 7
2 8 3 7 5
4 2
2 6
6 9 4
3 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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