Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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