Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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