Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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