Printable Hard Sudoku

Set 76cp9b. 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 3 5
7 4 2 3
1 7 2
3 5 9 6 1
9
2 8 4
8 6 7
3 5 4
7 8 2 5
Hard #2
9 2
3
2 4 1 8
9 1 4 3
5 6 4
7 1
4 7 3 5 9 6
3 9 7 8
7 5 2
Hard #3
8 1 5
7 1 8
2
9 4 7
5 1 7 3
6 5
5 4 3 7
4 1 9 5 8
8 2 3 1
Hard #4
8 6 1
1 6 5
7 3
5 1
6 2 3 8
9 3 4 2 6
7 3 4
8 1 4 7
1 8 5
Hard #5
4 9 7 1
5 1 4
6 1 3 2
4 6 2 5 3
2 5 6
8 4
8 5 2
8 2
7 3 1
Hard #6
6 7 8 5
4 5 6 7 2
9 4
1 2 6
7 8
1 8 7
2 5 7 4
9 3
4 3 8 9
Hard #7
6 7 4
1 8 4 5
3 8 9
2 7 3 5 9
4 7 9 8 1
2 1
4 8 3 6
5 1 2
Hard #8
4 7 9
5 4 9 3 1
2 8 6 5
6 9 8
3
3 5 9 1
3 6
6 2 1 8 3
7 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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