Printable Hard Sudoku

Set 1w8ncqe. 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
2 8 3
5 7
6 7 1 8
1 3 7 5 2
2 5 9
7 9 1
2 1 8 7
4 5
1 9 6
Hard #2
6 5 3
2 9
4 7 6 5 1
6 7 9 3
3 9 5
1 8
1 2 6
2 6 5
8 3 2 4
Hard #3
6 2 3 1 5
3 5
7 1 4
4 5 7
8 3 9
4 7 1 2
9 1 6 5
2 5 9 8
2
Hard #4
6 3 1
7 4 8 5
1 6 2
2 5 1
8 1 3 6
4 3 8
8 5 6
7 4
6 4 8 9
Hard #5
8 1 3 9 5
7 3 1 2
4 7
2 1
3 1
8 3 7 9
1 9 2 4 6
6
7 5 8 2
Hard #6
6 4 1 8 7
8 9 3
5 6
3 7
6 1 8 2
1 2 5
9 5 3
2 7 4 6
7 9 4
Hard #7
3 5 9 7 2
4
4 9 8
8 3 5
7 6
1 2 8 6
5 9 8
6 5 9
1 4 3 7 5
Hard #8
8 7
4 1 6 5
3 9 6
5 6 9 2 4
4 9 3 1 8
5 7
6 5 2 7
9 2 4 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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