Printable Hard Sudoku

Set 1fz9ts5. 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
2 4 8 7 5 3
1 5
3 8 7
1 2 6
9 3 1
7 6 9
6 9 2
4 5 8
2 9 3
Hard #2
4 1 5 9 2
3 6
6 7
8 3 1 9
7 5
4 8 5
2 7 6 8 4
5 6 9 2 8
2
Hard #3
7 3 4 2
7 2 3 9
4 7 6
8 1 5
9
6 3 8 4
6 2 1
9 1 2 6 7
4 1
Hard #4
3 9
2 3 6 8
8 7 1 3
4 5 6
5 6 7 9 4
7 2 3
5 8
6 8 7 2
3 1
Hard #5
5 7
8 9 4
2 9 3 4 8
6 1 8
3 8 9
2 5 7 6
5 9 1
3 9 8
5 7 8
Hard #6
4 8 1 6 7
6 3 4
9 1 6 4
3 2 5 9 4
9 2
1 2 6
8 7
5
2 9 8 4
Hard #7
6 2 5
5 8 4
3 5 9 8
6 1 7
2 9 5 7 1
7
1 8 7 6 3
4 9
8 2 1
Hard #8
2 8 5 9
5 2 6
4 3 9 1
7 9 6 4 3
8
1 7 5 4
8 1
7 6
2 1 6 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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