Printable Hard Sudoku

Set mh1eo8. 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 2
8 5 3 2
1 8
7 6 5 9
5 6 3 2 4
1 9
1 9 4 6
6 2 5
8 9 4
Hard #2
5 6 1
9 8 7 4
5 9 2
1 6
4 3 5 6 9 1
6 2 7 3
2 7 4 9
5 9 6
Hard #3
4 5 7 9
2
3 6
1 7 8
9 2
8 2 7 3 4
5 8 6 4
7 1 3 5
4 3 8 5
Hard #4
6 8 7
8 5 3
3 7 4 2
5 4
7 8 9 2
6 2 4 9
9 1 7 3
7 8 4
3 1
Hard #5
1 8 6 7
5 4
6 3 5
2 7 9 6 8
5 3 7
7 4
5 9
9 4 2 3 6
3 2 7
Hard #6
4 3 6 2
3 1 4
6 1 7 3
8 6 1
9 8
7
6 9 2 3 8
5 6
5 2 4 1 6
Hard #7
6 3
5
5 2 1 9 4
7 3 9
2 7 3
4 8 5
9 8 7 6 1 5
3 8 1 9
4 2
Hard #8
9 4 7
7 1 9 5
2 4
7 9 8 4 3
3 5 8 1
5 7 3 1
8
3 2 6 9 5 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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