Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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