Printable Hard Sudoku

Set wef1gv. 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
3 9 2 5
9 2 8 6 7
8
7 3
5 4 6 7 8
8 3 1
5 2 6 9
4 3
6 7 5
Hard #2
4 8 1 7
2 3 5 4
4 9 6 2
6 9 7 3
8 1 9
9 8
6 5
2 5 4 9 1 3
Hard #3
1 3 6
4 2 9 8
5 4 1
7 8 9 1
3 9 4 5 7
3 2
3
6 7 2 5
7 2 9
Hard #4
2 3 1 6 4
4 9 2 5
5 1 3
6 9 8 4 2
4 1 5
7 1 9
6 7 4
3 5
9
Hard #5
3 6 2 4
6 7 3
5 4 9
4 3 7
9 2 8 5
7 5 2
2 7 3 8
7 5
5 8 2
Hard #6
5 1 6 8
5 4 9 6 3
5 2
4 3 6
1 6 9 5
4 6 1
8 1 5 4
1 8 7 3
Hard #7
7 2 1 6 4
4 3 9
8 2 3 1
3 1 9
1 5 8
8 1 3 6 4 5
9 5
5 3 6
Hard #8
8 9 5 3
7 3 6 2
7 6
1 8
2 5 7 3 1
8 2 5
5
4 8
2 6 8 5 4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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