Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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