Printable Hard Sudoku

Set aqb3mp. 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
5 7 2
8 6
8 4
3 7 9
8 9 2 5 4
7 2 5 1
5 3 6
7 6 1 3
1 2 4
Hard #2
9 3
7 5 8 6 1
3 8 1 6 4
4
2
4 8 2 7
3 4
5 9 6 8 7
6 8 7 1
Hard #3
7 9 8 1
8 5
6 2 4 7
7 8 6 2
4 5 8 6
1 3 7
5 6 9 2
1 6 7
5
Hard #4
6
3 6 7 4
7 2 9 3 1 6
6
8 5 1
4 3 2
6 5
1 6 8 3
3 1 9 2 8
Hard #5
2 3 1 6 4
6 4 9
4 7 9
6 9 5 3 1
4
2 3 8 5
3 7 2
7 1 8 3
1
Hard #6
7 8
6 7 5 1
6 2 9
2 9 3
5 4 7
6 1 8 5
1 6 3 7 2
7 4
2 8 4
Hard #7
6
8 2 1
7 8 5 3
2 5 9 4
9 8 5
4 8 6
6 2 5
8 6 9 4 1 2
3 9
Hard #8
1 3 7 5
5 9 1 7
4 8 2
5 7 2 6
7 2
1 2 9 4
9 2
6 3
7 1 8 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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