Printable Hard Sudoku

Set 1vww6kv. 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
4 6 5
9
6 8 7 3
8 9 3 6
7 1 5
4 5 3 1
7 8 9 6
5 7 3
3 2 5
Hard #2
6 3 8
9 7 5 3
8
6 5 1 2 7
7 5 1
3 1 6 7 2
4 9 7
1
5 1 6 9
Hard #3
1 3 7 9
7 2
8 2 1 6
6 1
5
7 4 8
7 3 5 6 2 9 1
6 8
2 1 9 3
Hard #4
1 5 3
4 9 1
9 7
7 5 6 8
9 3
5 8 2
6 8 4
4 3 1 5 6 7 2
7 6
Hard #5
3 5 1
2 1 9 6
8 3 2
4 8 1 9
2 1 6 7
5 2
1 4 8 6
1 2
9 1 5
Hard #6
7 5
2 1 8
2 9
1 6 2 9
3 8 7
6 5 3 1 8
3 4 2
5 6 4 1
4 1 7
Hard #7
8 9 2 6
2 1 6 5
4 7
6 9 4
3 9 1
9 3 4 7
6 7 4 5
5 8 1
9 8
Hard #8
7 8 5 9
7 6
9 4 3 1
8 5 3 6 7
4
3 5
9 3 2
5 1 9 3
8 2 9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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