Printable Hard Sudoku

Set 13geipe. 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
3
6 5 4 9
3 5 6 7
7 6 9
3 2 5
9 5 4 7
5 7 4 8 9
8 2 1
8 1
Hard #2
4 3 9 1
2 6
9 7 1 5 3
3 7 2
6 8 7
4
5 1 6 4 7
9 3 8
9 7 2
Hard #3
9 1 5
5 3
6 5 7 3 8
3 9 7
4 8
8 7 1 6
2 6
1 9
5 9 2 4 6 3
Hard #4
4 1 6 2
5 1 7 3
2 9
6 4 5
5 7 8 1
9 6 2
9 3 6
8 7 4 1
9 7
Hard #5
9 6 3 1
4 7 8
5
7 6 5 8
3 1 2 4 9
2 6
1 4 7
5 7 3
7 2 3 5
Hard #6
9 8 4 1
1 7 3 4 6
3 7
8
5 7
6 3 1
8 2 9 1
1 2 6 9
9 7 6 4
Hard #7
7 4 3 6 1
2 4
3 4 5 7
2 8
1 3 2 7 6
9 6 5
9 7 5
7 2
9 4 8
Hard #8
6
1 9 6 8 3
4 3 1
4 7
7 3 6 2 8
2 5 3 4
9 5 1 8
2 5 9
7 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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