Printable Hard Sudoku

Set 1473pcl. 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 9 6 2
7
2 4 7 5
4 8 2 7
7 9 6 5
4 3
9 8 3 1
6 8 4 7
7 2
Hard #2
6 3 2
6 8
4 3 8 7
8 2 9 7 3
5 7
2 9 3
1 5 3
7 6 1 8
5 6 3
Hard #3
9 3
3 7 5 2 9
5 8 2
8 9 4 7 1 5
6 3 2
2 8 7
9 8 5
1 9
1 2
Hard #4
8 1 6 5
4 5 8 2 1
3 6 4
1 4
7 8 3
6 9 1
2 8 3
5 9 4
9 4 8
Hard #5
7 6 4
2 4 3 5
1 3 9 2
2 3 6
1 9 4
3 6 4 1
4
1 7 9 8 2
8 1
Hard #6
6 4 5
7 2 6
9 5 8 6
4 7 1 3
9 6 4 2 1
7 8 6
3 2
9
5 8 2 9
Hard #7
7 2
8 9 7
3 9 7 6
4 9 8 3 5 2
8 9
7 8 5
5 6 1
2
6 1 2 4 7
Hard #8
5
3 4 6 2 7
2 7 5
9 3 8 2
1 8 4 7
4 3
2 9 6
9 6 5 2
6 1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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