Printable Hard Sudoku

Set 1bq8xns. 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 7 6 9 8
5 6
9 1 4 3
6 4 9 5
7 5 2 4 9
9 5 6 2
4 1 5
3 8
Hard #2
1 2 3
7 8 5 2 6
5 3 4
2 9
5 4 9 1
6 7 3 4
8 5
7
4 6 8 9 7
Hard #3
9 8 2 1
5 7
7 9 5 2 6
1 7 4
1 9 2 3
2 3 6
2 6 4
6 7 2
9 5
Hard #4
2 1 7 9
5 7 6
4 5
9 2 1
2 3 5 4
8 4 9
6 9 3
5 7 8
8 3 1 6
Hard #5
3 1 5
1 8 9
9 7 4 5
2 3 9 8
1 2 3
4 8 5
3 8
4 7
3 6 5 7 2
Hard #6
9 1 2 7 3 8
1 7 3 2
3 7 6
3 9 4 5
1
5 4
8 9 2
6 5 3 4
7 2
Hard #7
9 8 5 4
4
3 9
4 8 9
1 6 5 7
3 9 5
9 4 7 1
5 1 2 6
7 3 2 4
Hard #8
8 5 3
1 7
7 3 6 8 4 1
9 2 4 6 8
6 1 2 4 3
8
1 4 9
7
3 6 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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