Printable Hard Sudoku

Set f1qwql. 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
4 2 6
9 8 3 2 4
7 3 1
1 4 7 2 9
6 3 9 1
1 2 5
2 8 1
9 1
6
Hard #2
8 5 6 7 2
7 6 1
8
6 2 7 1 3
8 7 4
3 2 9
3 5 9 7
1 6 5
1 3
Hard #3
6 9
1 8 9 4 6
1 3
3 4 9 5 2
6 8
3 8 9 4
5 8 3
3 1 6
2 9 5
Hard #4
3 6 8 7
5 3 7
1 2 4 8
3 1
6 9 3
9 6
6 2 5 7
5 9 1 6 2
4 9
Hard #5
2 8 1 9
5 3 1 6
8
6 7 8
5
4 1 2
1 2 7 4
4 2 6 9
8 3 9 4 1
Hard #6
5 4 1 8
5 9 1 6
8 4
8 4 1
4 2 6 3
6 8 2 9 7
3
2 6 7
6 8 4
Hard #7
5 4 8 9
9 4
6 4 7
5 2 8 1
1 6 7
7 9 1
7 3 2 5 6
3 7 5
3 4
Hard #8
4 3 6
3 6 9 1 7
7 1
3 7 6
1 4 2 8
3 1
2 8 5 4
9 4
4 3 6 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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