Printable Hard Sudoku

Set 9g2ltu. 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
5 6 4
1 8 2 3
5 1 3 6
7 4 9
2 6
1 3 7
7 5 4
6 9 7 8
8 6 9
Hard #2
9 5
1 4 8
6 3 2
5 7 8
3 2
3 7 1 2 6 4
4 1 6
1 3 5 8 2
6 9
Hard #3
4 3 2 8
8 1 7 5
1 6
6 7 2
3 7 4 9
8 9 6 1
7 3 2 9
3
8 6 7
Hard #4
9 4
7 8 2 3
1 8 3 6
8 7 2
5 8
1 6 7 4
1 5 3
2 4 9 6
8 4 5
Hard #5
1 5
8 7 9 3
5 2 8 6
3 1 4
1 5 3 2
8 1
8 3 7
9 8 2 6
2 7 3
Hard #6
5 6 8
9 2 4
3 8 4 2
8 7 6 1
3 7 2
4 5
3 7 8
1 9 6
8 6 9 3
Hard #7
8 2 1 3
6 3 2 7
9 7 6 5
8 5 2 7 4 6
7
3 1
2 1
7 9 6
6 5 1
Hard #8
2 1 7 6
7 9 8
1 4 2 3
5 2 1
8 9 7
1 3 2 5
7
6 4 5 8
5 6 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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