Printable Hard Sudoku

Set 1kq0fpp. 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 9 5 1
6 8 5
5 2 3 4
2 3 6 8
1 5 2
6 5 9 2
2 1 3
2 9 7
Hard #2
5 2 8
3 4 6
2 9 1
2 6 7
2 4 8
8 7 3
4 8 2 7
5 4 1
6 9 5 4
Hard #3
6 8 2 5
1 5 9 3
5 9 7 4
3 4 6 8
8 4
7 9
6 2 9
7
9 4 2 5 7
Hard #4
4 2 8
5 6 2 1 3
9
9 4 1
4 6 5 3 9
5 8
5 8 9 1 6
7 1 8 2 9
Hard #5
4 2 1
9 7 5 2
6 7 1 9 4
9 8 5
1 4
6 8 2 3
3 8 4
7 8 6
4 7
Hard #6
2
6 1 5 9 8 7
2 8 6 3
6 4 2
1 9 3 5
5 1 9
5 7
2 3 1
3 6 2
Hard #7
6 3 8
3 5 4 9
7 3 9 5
1 6 5
9 6 7 4
1 9
3 6 2
5 1 4
9 3 8
Hard #8
5 2
5 9 4
8 2 9 6
6 9 7 5
1 4 8
8 4 6
8 4 7
5 1 4 6 8
7 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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