Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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