Printable Hard Sudoku

Set whg3cy. 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
1 2 7 4
5 8 7 6
7 9 2 5
5 4 8
5 2 6 3
8 3 2 4
2 8
9 1 7
6
Hard #2
4
6 1 4
7 3 1 6 2
7 3 2
8 3 2 9
9 8 1 5
9 5 3
1 4 7 2
3 6
Hard #3
5 7
3 9 4
1 4 9 8 3 6
3 1 6
6 8
7 4 8 9 5
5 1
6 2 7
8 7 6
Hard #4
5 9 1 7 2
1 3
8 4
9 8 7 6 3
5 6 2 8
2 3 8 7
6 4 1
8 9
3 5
Hard #5
9 4 7
4 6 7 1
8 7 3 9
9 3 4
8 5 9
8 1 7
7 6 4 2
7 5
5 1 3
Hard #6
9 6 4
3 6 5 4
2 4 8 5 6 3
9
2 8
9 6 1 7
7 3 9 1 6
2
3 7 4
Hard #7
6 3 5 4
7 2 9 6
4 1
6 3 2 8 5
1 8 5
5 7 3 2 6
3 2 4
9 1 3
Hard #8
1
8 6 5 2 3
5 9 8 7
4 7
1 5 3 8
5 9 7
1 6 4
5 4 1 6
6 9 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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