Printable Hard Sudoku

Set 119v07a. 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 3 9 5
8 1
9 2 8 7
7 5 2 8
9
4 2 1 7
1 6 2
6 9 4
8 5 9 2
Hard #2
6 1
4 5 9 8 3
2
7 2
3 1 2
9 8
6 9 1 7
3 5 4
7 8 2 1 9 4 5
Hard #3
1 7
8 9 3 4
9 2 6
8 9 7 5 2
2 4 6 9
4 7
7 5
6 2 4
8 3 4 2
Hard #4
3 1 5
2 4 6
9 2 8
1 7 9 6
8 2
8 3 6 7 4
8 1 9 7
2 4
4 6 9
Hard #5
1 2
7 2 4 9
4 9 3
6 9 4 3
7 3 6 1 5
9 7 4 3
1 2 5 7 6
8 5
Hard #6
1 6 8
6 3 7 8
4 5 9 3 6
7 8 4 3
2 9
1 4 3 2
5 9 4 3
6 1
2
Hard #7
5 7 1 9
4 5 9
7 3 8
8 2 1 9
4 8 5
2 6
2 7 9 8
1 6 3
5 7 1
Hard #8
2 7 6
4 1 2 7 9
1 8 4
8 9 5 3
5 3 4 2 1
4 7
6 8
2 9 1 5
2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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