Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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