Printable Hard Sudoku

Set 1m9qyxp. 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 6 3
1 8 9
3 4 6 5
8 4 1 9
9 5 7 6
5 2 7
8 6 3
5 6
1 4 9
Hard #2
6 2 4
8 1 9 2 3
2 7 8
3 6 5 9
9 3 1 6
1 6 9
4 6 2
5 6 7
4
Hard #3
5 2 9
7 8 2
2 1 7
2 3 9
9 5 8 6 2
5 4
6 9
4 3 6 2
6 1 4 3
Hard #4
1 9 6 2
8 1 3
1 9 5 8
8 4 7
7 8 2
7 4 3 8 5
3 2 7
9 4 2 6
Hard #5
1 6 2 4
3 9
8 2 7 6
9 6 2 1
1 7 2
2 4 6 3
5 1 7
2
6 8 1 3
Hard #6
8 2 4 1 6 3
7 4
9 1
9 6 1 4
7 8 9 5
8 2
4 2 5 1
8
3 2 1 8
Hard #7
3 4
9 2 6 7
6 5 9
4 2 5 1
6 8 3 7
7 1
5 7 4 2 8
6 5 9
3 4
Hard #8
2 9 6
1 8 4 7 9
7
3 2 4 5 6
9 8
5 1 3
7 8 1 3
3 5 8
9 5 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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