Printable Hard Sudoku

Set 1jru240. 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 2 6 1 3
6
7 4 8 1 5
8 3 2 7
3 4 6
1
2 9 5
5 6 1 3
3 2 4
Hard #2
1 4 5 6
9 3 1
6 7 2 3 4
9 2 7
8 7 6
2 6 5 4
8 1 2
4 3
8 5
Hard #3
4 6 8
7 9 2 5
2 5 1 6
6 7
2 9 8
8 7 6 1
2 7 4 9
5 6 4
5 3
Hard #4
7 8 5 1 6 2 3
9
9 1 3
6 3 5 4
7 2 1 5
5 9
2 7 4
1 2 7 6 4
Hard #5
3 9 8
2 5 7 1
8 2
6 5 9 3
2 5 7
7 1 6 9
9 5 8
8 9 6 7
1 7
Hard #6
1 8 5
4 8 7 1 3
5 7 6 8
3 9 1 2
7 9
6 8 1
2 5 4
3
3 9 1 7
Hard #7
2 9 3 6 8
6 5
8 5 3
9 7 3 4 8
3 7 6
5 9
7 2 5 8
4 6 3
2 1
Hard #8
9 3 1
3 6 5 4 2
4 7 3 2
8 2 1 4 6
9
7 5 8 9
4 8 9
9 3
2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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