Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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