Printable Hard Sudoku

Set 11ipio. 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
9 5 6 3
3 4 2
8 3 9
6 7 2 4 9
1 2
5 8 1
8 5 6
3 7 8 9
9 7
Hard #2
2 1 9 7
6 4 5
3
6 1 5 7 4
1 6 8 2 5
5 8 1
9 7 6
4 5
2 6 8
Hard #3
4 2 3
3 7 8
6 8 5
4 2 7
3 8 9
1 9 3 2
1 8 3 5
3 7 9
9 3 4
Hard #4
9 1
7 4 1 8
6 5 7 3
3 5
1 9 5 3 2 7
5 9
4 7 2 6
1 9
9 5 2
Hard #5
9 4 5 7
2 7 5
5 4 3 6 8
9 7
6 1 4 3 8
3 7
8 5 2
1 9 6
7 5
Hard #6
6 1
8 5 3 7
3 7 4
2 4 8 6
2 7 3
7 1 2
7 9 4 5
8 6 9 1
5 2
Hard #7
5 6 1
8 2 7
4 7 6 3 9
6 8
9 4 2 7
9 2
3 8 6
9 6 4 5
2 9 7
Hard #8
7 3 6 4 5 2
7
6 1 2 3
1 6 3 9
2 6 5
4 7 2
9 8
7 1 4
1 2 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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