Printable Hard Sudoku

Set e7eumy. 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 4 8 7
5 1 3
9 8 3
9 8 1 2
5 2 3 6
8 9 1
1 4
6 2
7 5 2
Hard #2
8 7 5 9
5 4 3
9 2 4 8
4
4 7 3
1 9 7
7 6 5 1 2 8
8 4 6
6 3
Hard #3
6 4 1
8 3 5
7 9 1 6 4
2 5
8 9 7
9 6
6 9 2
1 2 3 4
7 3 1 8
Hard #4
8 9 2 3
6 3
1 5 8
6 9
4 6 8 1
3 2 7
4 2 5 9
5 9 7 1 4
7 3
Hard #5
6 1 7 4 9
4
2 5 7
9 3 6 4
2 1 4 9
6 8 2
3 8 1
2 5
4 6 3 2
Hard #6
7 4 8 3 5 1
3 4
2 9
5 6 8
9 6 3 4
4 7 8 9 6
8 2
1 4 5
5 9
Hard #7
3 8 9 2 1
1 3
2 9 6 4 7
5 7 6 8
2 1 4
9 7
1 9
7 4
9 6 8 2
Hard #8
3 4
2 4 3 8
8 7
6 2 8 7
5 9 3 6
2 4 1 9 3
1 5 2
7 9 8
8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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