Printable Hard Sudoku

Set 1ypr915. 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
8
5 2 3 6
7 3 2
7 2 1 3
2 3 4 8
9 3 8
9
4 1 6 2
1 6 7 8 5
Hard #2
7 2 8 6
6 1 7
8 9 2
4 3 6
8 5 2 3
3 1
7
9 4 1 8
1 3 5 4 9
Hard #3
9 2 1
3 6 5 7 2
7 3 9
5 9 6
3 8
5 9 4 1
3 6 4
7 4 5
8 2 7
Hard #4
8
4 7 6 5
2 6 7
5 1
7 1 8
3 8 4 6
3 4 9 5
9 8 1
1 8 6 3 2
Hard #5
6 1 3
4 2
9 8 2
6 8
2 7 4 6 1
8 9 3 2
2 7 5
8 6 1 9
7 1 6
Hard #6
9 5 2
1 8 2
3 9 6 8
4 1 8
8 9 6 5
6 1 3
9 4 2
5 8 7
5 1 4
Hard #7
5 7 3 4
5
1 3 9
8 2 3 4 9 5
6 8 1
2
4 7 1 5 6
2 7
3 4 2 8
Hard #8
8 7
4 2 8 5
9 4
4 5 1 2 8
3 2 9
7 8 6 5
9 3 8
9 5 6
8 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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