Printable Hard Sudoku

Set xcjbv9. 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 7
2 1 3 5 8
7 5
8 1 9 5
9 3 5 4 6
9 2 7
6 3
7 6 1
1 7 2
Hard #2
1
4 5 3 7
7 9
3 4 7 2
5 1 6 3 9 4
7 8 1 6
1 8
9 6 2 3
8 5
Hard #3
4 5 3 9 2
7 2
6 8 5
3 7 6
8 1 2 3
9 4 3
1 2 7 4 5 6
4 7
1
Hard #4
5 3 4 7
4 1 9
7
5 8
7 8 9 5
4 1 5 7 3
4 6 3 9
5 3
3 2 7 8
Hard #5
6 1 9
8 6 1
1 7 3 6
8 6 7 3
9 4 1 8 2
5 8 9 7 6 1
2 3
2 8
Hard #6
8
8 1 4 5 3 9
9 5 7
7 3
3 5 1
7 6 8 4
2 8 9 4
6 7 1 9
7 6
Hard #7
1 9 6
5 4 9
7 5 8
7 6 5 8
2 3
8
7 9 6
1 3 2 8 4
6 8 3 5 7
Hard #8
2 1 3
4 2 8
5 6 3 7 9
2 3 4 7
5 6 3 8
9 5 6
9 8 5
5 4 7
7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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