Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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