Printable Hard Sudoku

Set fp6si2. 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 9 8 5 2 4
3 6 2
1 7 9
2 4 1 8
5 4 3 6
5 9 7
8
3 6
6 7 4
Hard #2
2 8 5 1 6 9
5 3
6 4 2
5 7
7 6 5 4
4 9 8
1 4 9
8 7 1 2 3
9
Hard #3
8 6 9 3 7
1 2
4 7 2 5
2 5 3 6
9 5 1 8
4 7
8 5 1 4
6 4 2 8
Hard #4
1 4 5
3 5 7 4 2
4 5 3 1 9
8 2
4 3
7 9 5 4 1
5 6 7
8 2
5 2
Hard #5
6 2
4 6 8
5 9 8 1 7 2
3 9
8 5 7
2 6
3 9 6
4 7 8
6 5 8 2 4
Hard #6
4 6 5
5 2 1
7 2 3 4 9
5 1
9 5
4 3 6 9 8
5 1
2
6 7 2 5 9 3
Hard #7
8
4 3 7 5
8 3 9 1
7 6 5 8
2 8 6 3
7 3 9 8
5 4 6 7
1 4 3 2
Hard #8
4 6 3
6 5 1
8 2
2 4
6 8 3 9
1 2 5 8
3 9 8
8 3 9 6 5
2 9 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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