Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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