Printable Hard Sudoku

Set 1jd28ww. 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 5
6 7 2 8
1 8 4
4 1 9 7
3 5
6 5 2
7 1 4 6 8
8 4
6 5 7
Hard #2
1 5 6 3 2
3 8 2 7 1
5 6
6 2
9 1 5 8
8 9
6
5 2 7 3
7 1 5 4
Hard #3
4 3 7
6 7 9
5
5 7 4
9 7 2 6
6 2 4
5 1 4 9 2 6
2 1
7 8 1 9
Hard #4
4 1 5 8 6
4 3
8 9 1 5
2 1
1 8 9 4
6 7 8 9
6 8
5 9 1 3 2
3
Hard #5
6 2
8 1
8 7 3 6
9 6
2 1 9 8 7
2 5
8 9 3 5
4 7 9
6 8 1 5 7
Hard #6
1 2 6
4 8
3 2 1 9
7 4 2
9 1 5
7 2 4 5
7 6
2 7 1
1 9 3 7 5
Hard #7
4 7 3 1 8
6 9 2
4 3
2 7
1 9 4
1 8 7 2 3
5 9 7
4
3 4 9 6 1
Hard #8
8
9 2 5 1
1 5 8 2
7 9 6 4 5
6 9 3 8
2 1
5 9 3
6 9 7 2
3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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