Printable Hard Sudoku

Set 17sqvn6. 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 4 1 3
9 5 2
1 7 6
5 2 6 9 7
1
6 2 5 8 3
3 7 1
7
7 4 5 8
Hard #2
4 2 3
7 1 8 4 9
5 3 1 7
3 6 2 9
2 4
8 7
2 6 5
1 6 4 3
3 5
Hard #3
9 4 5 2 8 7
1 3 7 8
1 4
4
8 9 6
6 2 3
4 1 3 7
2 9 5
2 3 6
Hard #4
2 6 3 9
4 1 7
4 9 2
6 7
2 1 6 9 3
5 7
3 6 4 5
8
4 5 8 2 1
Hard #5
1 2 9 3 7
6 9
4 8 6 9
8 2
3 5 6 8 4
1 2 6 9
1 5
3 7 9
8 9
Hard #6
3 1
9 5 8 4
4 9 8 5 1 6
6 5 3 2
1 5 2 8
9 6 4 7
5 8 2
2 9
Hard #7
9 3 6 8 5
4 9
6 9 5 7
9 6 2 7
1 3
5 1 6
7 3
6 5 9
1 3 4 2
Hard #8
3 9 5 7
2 8 9 3
6 5 9 7
6 9 2
2 6 9
4 7
4 1 7 6
2 5
7 2 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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