Printable Hard Sudoku

Set 1jvf732. 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
6 8 4 7
9 3
1 7 2 8
9 5 6
8 3 9
5 4 3
8 2 6 3
2 7 3 6
3 1
Hard #2
3 5
5 7 3 6 9
1 4 2
3 8 2 4
4 7
9 8 6
8 2 6 3 9
5 8
6 9 2
Hard #3
2 3
1 4 5 6 2
6 8 4 5 9
5 9 4
4 7
9 1 8
7 6 2
1 3
4 5 7 1
Hard #4
4 9 1
3 1 8 2
1 2 4
8 9
2 9 6 5 4
6 5 2 8
4 3 8 9
2 7 3
5
Hard #5
3 7 8
7 9
7 6 2 5
3 1 4 6
5
4 2 8 3
8 3 6
2 6 4 7
9 4 2 1
Hard #6
2 8 6 3
9 3 6 2
1 8 3
4 2 7 5 6
3 7
9 3
1 8 4
4 5 3
6 9 5
Hard #7
5 3 6 9
1 8 2 6
5 3 7
7 8 4
3 8 4 5
9 6 7 3
1 8
1 7
2 4 1
Hard #8
7 2 5 4 9
1 6 2 4
7 5
6 3
2 4 6
3 1 9
8 1 7
5 9 1 2
3 5 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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