Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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