Printable Hard Sudoku

Set 1jl59e1. 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
7 9
4 7
5 1 6 7
8 4 2
2 7 4 9 8 1
1 8 2 4
6 1
8 5
1 8 9 6
Hard #2
7 2 8 1
8 7 3 5
5 8 6
3 5 1
1 2 6 3
9 4
7 9 4 5
1 6 7
3 7
Hard #3
8 2 5
5 4 6
3 6 9
7 5 3 8
1 3 2 6 5
5 4 6 7
6 7 8 9
9 3 2
Hard #4
8 4 6 1 5
1 7 2
3
8 3 1
5 4 8
7 5 4 1
7 8 3 9
5 7 2
3 5 4
Hard #5
3 2 7 8
8 5
6 5 1 7
7 3 1 9 2
6 8 1
1 2 5
4 7 6
8 4 5
9 5
Hard #6
4 1 3 6
6 9 7 3
4 2 7
8 9 7
4 8 5
2 7 1 9
4 6
5 3 9
6 5 8
Hard #7
7 6
2 3 8 5 7 4
4 9 6 2
9 6 1
7 8 4 3
5
7 8 3 9 1
5 1 8
7
Hard #8
8 6 5 9
7 8 3 4
1 2 6
2 8
5 1
8 4 1 2
6 8 3 7
7 6 3 8
4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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