Printable Hard Sudoku

Set 1hzyu2g. 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
6 1 2
3 8
2 3 5
4 9
7 5
2 6 8 7
5 6 9 3 1 2
9 8
3 7 2 6 9
Hard #2
2 1 9
7 6 4
3 6 2
9 8
6 9 5
1 4 5 2 8 7 6
9 1 5
4
5 7 3 1
Hard #3
2 1 7 8
5 6 3 4
6 4 8
4 3
3 8 6 4
7 3 2 9
9
6 5 4 8
3 5 7
Hard #4
6 1 2 4
6
4 7 3 2
2 1 5
8 9
9 8 2 4 5 7
7 9 2
5 9 1 8
8 3
Hard #5
2 5 3 9 8
1 5
9 1 4
6 3 8 2
9 1
9 8
8 2 1 7 9
9 6 7
6 2 3
Hard #6
5 7
5 2 4
7 4 3 1 5
5 3 8 6 1 9
9 4
1 7 8
2
9 5 1
5 9 6 4
Hard #7
4 9 1
5 4 7
7 6
8 7
9 5
3 7 1 9 4 8
2 9 8 4 7 3
4 3
6 1 4
Hard #8
4 6 5 9
6 9 4 5 8
7 2
2 1
1 3 6
7 1
1 9
9 5 8 3 4
6 4 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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