Printable Hard Sudoku

Set 1wy6nmq. 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
9 7
1 2 5 8 4
7 9 1 2
7 5 8 2 1
3 1 6
4 6 9
5 1
7 9 3 2
3
Hard #2
6 5 9
6 2 4 3
3 9 1 2 8
4
1 6 9 3
5 8 6 1
5 4 2 9
4 5
1 4
Hard #3
1 3 6 2
1 7 6 3
8 9
5 7 8
7 9 1
2 5
8 1 4 2 9 5
4 6 9
9 3
Hard #4
1 5 3
2 9 1 3 4
8 2 5
3 7 5
9 4 3 6
2
4 7 3
1 2 7 4
7 9 8
Hard #5
7 8 1
5 4 3
1 8 5 3
3 5 6
2 9
1 9 8
9 8 6
6 4
5 1 2 4 7 8
Hard #6
4 2
3
7 6 1 4
8 2 4
6 8 1
1 5 9 8
8 4
6 2 3 4 8 5
7 6 2 3
Hard #7
5 4 1 2 7 8
8 1 4 3 7 5
8 9
7 8 6 1
6 2 4 9
2 6 9 5
5 8 1
Hard #8
6 9 8 2 1
2
1 2 5 6 4
1 9 7 5
8 3 5
7 6
7 1 9 2
2 3 8
9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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