Printable Hard Sudoku

Set rq9y1m. 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
2 3 1 8 6
9 8
6 4 2 5
9 8 7 1
2 7 9 6
9 7
3 2 5
8 4 3
Hard #2
5 3 6 4 8 9
9 7 5
4 3 7
8 7 6
9 3
1 6
9 6
5 1 8 4 9
2 5 1
Hard #3
9 5
2 3
8 6 4
7 2 6 1
1 5 7 6
5 3 7
6 9 2 3
1 8 5 9 4
5 7
Hard #4
7 8 2
9 3
5 8
3 2 1
2 8 7 3 9
1 8 3
4 6 9 5
9 4 1
7 9 4 2
Hard #5
4 3 6 9
6 1 8 5
8 4 6
9 1 5 6
2
7 6 8
2 9 4 1 7
9 3 2
3 8
Hard #6
2 6 1 3 9
5 2 6
9 5
8 2 4 5 7
7 6 1
2 7 4 6 9
9 5 1 7
7 3
Hard #7
7 8
9 1
5 7 2
2 5 8
7 1 3
9 4 7 3
9 5 3 1
3 2 1 6
1 9 2 5
Hard #8
5 4 2 1 8
3
1 6 8 2 7
7 8 6 9
5 9 7
2 9
7 4 5
3 1
8 5 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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