Printable Hard Sudoku

Set 1pgqv0b. 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
3 4 1
6 4
7 1 2 5 3
8 9 5
7 4 2 5 3
4 1
6 4 9 8
4 8 5 3 2
Hard #2
9 6
3 4 5
6 2 1 5 4
6 9
1 6 2
7 8 4 6
3 4 7 2
5 2
7 3 5 4
Hard #3
9 1
6 7
2 5 6 1 3 8
9 6 3
6 9
5 1 7 2 4
6 7 3
8 3 1 6
9 2
Hard #4
1 8
3 8 7 4
9 1
5 6 9 1
5 3 6 7
9 8
3 8 5
6 2 4
8 6 3 5 9
Hard #5
2
7 2 4
4 3 8 5 6
1 6
3 1 6 2
2 4 7
9 2 8 4 1 6
8 1 3
1 5
Hard #6
4 2 5
2 7 8 9
3 1 4
8 5 6
3 5 6 1
7 4 1 2
7 3 6
4 6 9
7 8
Hard #7
4 6 5 7 3
1 9
5 4 8 7
5 2 4
7 5
1 2 9 5
2 4 1
7 1 6 2
6 8
Hard #8
9 8 3 7 2
4 8 9
2 4 3
1 5 8
6 4 1
1 9
3 7 6
6 2 1 9
3 5 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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