Printable Hard Sudoku

Set 1ehq5tz. 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
1 9 6
4 2 1
2 6 7 4 9 5
8 6 7 4 1
7
7 9 8
2 6 4 8 5
1 2
3
Hard #2
1 4 8 5
6
2 5 8 1 3
9 8 5
7 4
8 1 9 7 2
4 7 9 8
7 3 6
6 2
Hard #3
2 6 4 7
9
7 6 4 1
8 7 3
4 1 9 8
3 2 6 4
7 1 2 9
9
9 8 7 6
Hard #4
6 7 1
5 6 7 9
1 8 2
7 8
7 3 4 6
2 3 9 5
6 9 2 4 1
6 3
1 7
Hard #5
1
7 6 1
3 8 6
5 4 2 9 8 3
8 5 1 6 2
4 3 9
4 5 8 6
1 2
2 9
Hard #6
9 2
8 2 9 4
2 5 9
7 6 4 9
9 6 1
1 6 8
8 2
8 6 9
4 8 6 1 5
Hard #7
8 6
4
3 2 6 1
9 8 2
2 1 7 3 5
7 1 6
4 6 7 1 2
4 9 7
8 5 9
Hard #8
3 8 5
6 9 2 5
4 9 3 7 1
5 9 7 2 6
2 3
4 1
2 4 5
1 6 7
1 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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