Printable Hard Sudoku

Set 19qjmhm. 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 4 5 1
4 2 5 1 3 7
6
1 5 3 8 2
2
7 3
2 4 1
1 7 2 8 5
1
Hard #2
9 7 1
5 3 9
5 4 3
7 2 4 3 5 1
8 6
7
2 6 1 8
5 1 8 4
1 7 2
Hard #3
6 1
9 2
2 8 5 9
9 1 4 8
7 3 8 4 1
8 3 2 1
4 3 7
5 9 7
7 2
Hard #4
2 1
5 9 2
4 2 8
7 2 8 4 9
6 5 9 8 3
1 5
8 2 5
1 6 5
4 9 7
Hard #5
1 7 6 2
8 7
6 4 1 8 9
2 4 3
6 7
2 8 5 1
7 4 5
6 3
2 1 8 5
Hard #6
8 1 4
1 7 3
2 5 9 3
3 8 9 1
2 6 7 4
4 6
7 4 1 2 8
2 7 4 5
Hard #7
7 8
8 4 7 2
1 4 3 8 6
5 9 7
6 8 4 9
3 7 5
5 1 6 3
4 8
3 6
Hard #8
9 2 4 5 8
5 1
7 8 6 4
6 9
9 2 6 3
5 1 2
7 3
6 1 5 2 4
8 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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