Printable Hard Sudoku

Set vxc8tm. 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 7 5
6 3 4 1
7 5 3 2
2 9 7 1 5 4
6 8 9
5 8 2 9 3
2 8
1
Hard #2
4 5 2 8
7 9 4
1 5 8 6
2 4 3 7 1
6 9 5 3
5 1
3 7
7 2
7 5 9
Hard #3
2 3 5 8 7
7 4 1
8 6
5 7 8 9 4
4 9 3
2 7
8 6 2 3
9 1 7
1 9
Hard #4
9 7 4
3 6 2 8
2 6 1 4
3 4 8
8 9 6
2 5 3
7 6 9
8 9 1
2 5 4
Hard #5
9 2 6
5 7
6 1 8
6 1 8 5
7 4 1 9
5 4 3 6
2 8 6 5 1
4 9
8 7
Hard #6
3 4 6
8 6 9 2 5
9 4
1 4 9 2
5 3 9 7
5 7 3
2 8 4
8 3
7 5 9
Hard #7
2 8 7
7 6 1
1 2 9
2 4
7 9 1
9 7 3 5 6
4 2 6 8 5
3 1 4
8 7
Hard #8
1 2
4 7 5 3 9
2 9 8
7 3 4 5
2 9 8 7
6 2 8
3 8 2
7 4 6
6 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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