Printable Hard Sudoku

Set 1an9ruv. 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
6 1 3 7 9
2 3
4 7 1
5 9 3 2 4
6 1 5 3
2 1
1 4 9
6 7 2
8 5
Hard #2
4 3
6 5 3
1 8 6 7
1 9 4 5
5 3 7 2
3 2
4 3 6 1 8
7 4 2 1
5
Hard #3
2 3 4
9 8 5 2
3 4 2 8 7
4 9 2 7
7 9 5 2 3
3
4
3 6 7 8
7 4
Hard #4
1 5
6 4
8 9 2 6 7
1 8 4 3
4 1 3 7
7 9 1
8 6
3 9 4 1 8
9 5
Hard #5
2 5
3 5 7 4 1
6 1 7 2
2 3 5 8 6
1 6 2
8
1 7 9 3 5
9 4 7
9
Hard #6
6 1 7 3
9 7
6 1 5 9
4 2
1 8 9
5 2 9
1 6 5 4
1 8 3 6 2
7 8
Hard #7
9 8 2 1
1 2 3 9
6 5 4
7 8 4 1
9
9 2 5 8 1
7 3 9
6 8
9 4 6
Hard #8
4 9 3 6 5
8
1 2 9 4 8 7
3 2 5 6
8 9 4 2
7 9
4 9 2
9 7
2 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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