Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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