Printable Hard Sudoku

Set 2s1hqd. 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
7 6
8 6 2 7
3 4 7 5
7 3 8
9 8 1 7
4 8 2
4 2 6 3 9
6 7
5 1
Hard #2
2 8 5 7
9 7 6 2 1
5 3 4 9 6
4 1 9
9 6 5 8
3 2
6
1
5 2 6 8
Hard #3
9 1 5 7
3 2 9
6 8
3 4 8
7 5 6
2 9 7
7 1 5 6
1 4 3
6 9 5 8
Hard #4
4 7 6
5 4
7 6 9 8
5 9 3
3 8 2 4
2 6 4 5 9
1 7
1 2 5
7 3 1
Hard #5
3 9
8 2 1
2 5 7 1
8 7 6 2
4 2 9 8
9 8 6
1
9 2 6 8
1 7 6 3
Hard #6
8 3 6 9
5 8 2
1 5 2 6
6 3 8 7 9
4 5 2
7
7 9 1
2 7 6
3 1 5
Hard #7
6 3 4
5 4 2 7
5 3 9
4 3 1 9
5 1
1 6 5 8 9
7 8
1 4
9 2 6 3
Hard #8
8 3 6
6 9 2 1
3 8 9
3
7 5 2 1 8 3
6 9
8
2 9 7 6 4 3
1 4 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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