Printable Hard Sudoku

Set 17b6te9. 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 3
6 7 5 4 1
5
4 6 7 1 8
1 5 6
8
8 4 2 3
1 6
5 4 6 9 2 7
Hard #2
1 3 8
5 6
6 5 7 8
3 7 8 9
8 2 7
1 8 3
2 5 6 7 9
5 3
8 4 9
Hard #3
3 2
9 8 6 1
8 1
7 3 4 5
2 1 8
3 4 7 2
4 8
2 6 7 1 3 4
7 5
Hard #4
2 1 5
7 6 2 9 3
9 8 7
1 7 3 4
5 9 8
5 3
8 5 7
4 2
3 4 9 6
Hard #5
6 1 7 5 3 8
1
3 6 2
7 1 4 3
8 2 4
5 3 9
6 8 9
9 6 4
8 5 7
Hard #6
7 3 2 6
7 8 3
9 7 5 2 4
2 3 5
8 5 1 6 7
9 8 3 1 5
2
4 1 6
Hard #7
6 8 5 9
2 3
4 2 1
1 5 2 9 8
3 4 7
6 1 2
2 3 1 7 9
7
1 6 2
Hard #8
7
1 4
6 8 1 7
3 4 2 6 8
6 9 4
1 5 3 9
7 6 8
5 4 9
5 1 7 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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