Printable Hard Sudoku

Set jhc1s1. 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 1
7 4
4 5 9 8
2 6 3 5
3 8 7 6
1 3 7
5 8
1 8 4 5 2 7
7 5
Hard #2
2 8 3
1 9 8
6 1 5 2 7
2 7
8 7 6 4
6 9 1
5 1
4 3
9 8 5 6 3
Hard #3
8 6
1 3
5 1 4 9
2 6 7
6 9 1 4
8 5 9 6
5 1
4 5 3
3 2 4 9 7
Hard #4
7 2 1 8
3 5 6 9
5
7 6
7 2 9 5
8 4 7
7 6 1
3 9 8
6 2 3 9 4
Hard #5
5 6 3 7 4
8 5 9
7 6 5 2
9
2 3 1 5
8 9 1
1 7 2 8
6 8
2 5 1
Hard #6
2
8 9
3 5 7 1 8 4
4 9 2 1 5 8
5
1 4
7 1 9
9 3 2
1 4 9 3 6
Hard #7
5 8 2
7
9 1
2 6 7 1 4
8 6 1 2
5 7 9 3
7 8 5 2
1 5 4 8
6 9
Hard #8
8 4 2
2 3 7
4 6 9
6 5
3 4 7 9 6
1 9 8 2
3 7 4 1
4 8
2 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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