Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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