Printable Hard Sudoku

Set 1olwny8. 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
8 2 5 9 6
1 7
9 5 8
2 1 4 3
3 4 5 1
6 9 7 4
5 8
6 9 7
7 6
Hard #2
1 7 9
6 3 1
9 5 7
4 1 5
2 7 5
8 6 2 3
1 4 9 7 2
8 6 4
5 8
Hard #3
7 1 9 2
1 8 5
4
8 1 7 6
5 1 3 6 7
8 1 9
2 7 9 6 8
9 7 5 4
Hard #4
8 4 1 3
1 6 4 5
3 9 4 1
9 2 4
6 7 8
9
4 3
9 2 1 7
4 7 9 1
Hard #5
6 9 1 4
1 9 2 5 8
5 3
4 3 1
1 6 2
9 4
8 4 6 5 2
5 3 9 6
4
Hard #6
9 3 8
3 1 5
6 9 7
9 2 5 3
1 7 5 2
7 4 6
7 5
4 9 2
9 6 8 1
Hard #7
6 9 1
6 3 2 9
3 2 5
9 5 7 6 8
8 6 3
9 1 3 7
2 6 8 9
2 7 3
Hard #8
4 9 1 2
6 4 1 8 5
1 8 5
6
8 9 7
3 1 7 5
5 4 2
1 6 9
7 3 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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