Printable Hard Sudoku

Set s7a5og. 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
3 9 2
8 6 3
3 8 1 5
6 2 7 8 9
8 1 5 6
4 1 8
5 6
1 3
2 9 1
Hard #2
5 4
9 3 1 8
4 8 7 6
5 9 4
8 6 4 5
2 7
6 3 2 5
8
2 1 9 7 3
Hard #3
3 9 4
7 4 3 5 9
8 9 4 2
7 4
1 5
5 1 6 3 4
7 1
9 6 5
4 9 3
Hard #4
8 3 9 4
2 8
4 7
9
4 3 1 6
2 6 7 4 3
5 9 1 2 8
1 9 4
5 8 1
Hard #5
5 1 8
1 2 7 4
3 4
2 9
3 1 7 2
6 2
7 4 1 9
4 5 6 7
1 7 3 4
Hard #6
3 8
7 4 2 3
5 7 4 1
4 3 2 7
6 2 1 3 9
8
1 3 9
2 6
6 1 7 4
Hard #7
2 1
7 4 6 2 9
7 9 2 8
8
5 6 9 7
2 1 5 4
8 4 6 1 9
6
1 3 5
Hard #8
2 5 3
8 6 5
6 7 5 1
5 1
4 6 9 2 1
7 3 6
9 4 7 8
3 9 5
4 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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