Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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