Printable Hard Sudoku

Set 1kfhn92. 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 7 9
8 7 2 6
6 1 7
7 2
9 5 2 8
3 6 5
1 9 5
7 9 4 1
5 3 1
Hard #2
5 4
9 4 8 1
6 8
3 1 5 2
2 6 7 8
4 3 8
6 4 1
1 8 2 7 9
2 4
Hard #3
4 8 9 7 2
5 9
3 2 7
1 3
6 8 4 3
1 6 5 8
9 4 8 6 5
1 3
1 9
Hard #4
6 4 7 5
3 1 6 2 4
7 9 6
8 7 4
4 9 6
6 8 3
6 8 2
3 5 4 6
5
Hard #5
8 6
3 8 5 1
6 7 9 4 5
1 3 8 4 6
8 5
5 1 7
2 1 7
3
4 3 7 5
Hard #6
3 8
6 4 3 1
7
8 7 2 1
5 2 9
3 8 6
1 8 6 5
8 7
9 6 2 1 5 8
Hard #7
4 2 7 8
3 9 5
1 7 5
4 8 1 2 6
7 6 9
6 4 5 2 1
2 7
5 3
1 4
Hard #8
6 7 2 5 9
7 1 3
1 2 8
6 8 3 9
4 5 6
2 6 7 4
9 3 2 4 8
3 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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