Printable Hard Sudoku

Set 1xvm8tb. 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 3 1 5
3 4 2 1
9 6 3
9 7 4
3 6 9 7
6 9 5 4
8 1
5 7
1 7 8
Hard #2
6 2 4 8
4 3 1 6 2
8
2 7 3 9
5 2 1
7 9
4 8 3
8 5 2
3 1 9 4
Hard #3
6 1
3 9
2 7 6 4
3 1 2
2 4 8 6 5
7 6 5
3 7
2 1 4 3
7 2 9 8
Hard #4
8 6 9 3 4
5 4 6 3
4 5
6 5 9
7 6
2 4 3 6 9
3 2 8
5 3
9 7 5
Hard #5
6 2
8 3 9 6
9 1 3 4
3 7 8
7 1 9
1 2 7
5 2 8
6 2 5 7
8 4 7
Hard #6
3 8
2 1 4 5
8 5 3 7 4
9 2
3 8 6
6 3 8 1
3 5 8
1 5 7 2
9 8
Hard #7
3 9
7 4 9 1 2
1 5 3
1 5 3
6
4 2 3 6 5
6 1 4
5 4 3 2 7
7 9
Hard #8
3 6
5 4 9 8
1 6 5 2
8 4 7
4 7 2 1
5 1 4
4 9 8
2 3 9
9 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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