Printable Hard Sudoku

Set e9fmhp. 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 1 5 6 8
3 4 7
5 7 6 1 2
7 9 1
3 5 2 7
3
7 2
4 8 5
3 6 7
Hard #2
9 2 6
7 9 4 6 1
2 4 8 5
3 2 4
7 5
6 8 2 7
5 9
7 9 1 2
4 8
Hard #3
5 9
9 2 1 8 4 3
3 4 6
7 2 1
1 5
2 5 7 9
1 9 2
4 7
3 4 8 1
Hard #4
8 4 1 6
1 7 9 3 2
3 7 5 8
3
9 2 5
2 8 4 7 1
4 7 2 6
9 5 6
Hard #5
9 5 6 8
6 4 2 7 9
5 1
5 4 1
6 7 9 4 5
3 6
3 4
6 3
7 2 5 6
Hard #6
9
7 5 6
6 4 9
4 5 2 6
1 9 8 4 5
5 3 4 7 1
1 8 9
6
8 2 9 5
Hard #7
5
6 9 2
8 2 1 6 5
1 5 4 3 2 9
9 4 5
3 1 8
2 7
1 7
9 3 6 4
Hard #8
3 5 8 1
9 2 4 5 6 7
3 2
2 5 9 4
1 8 7
6 7 9
4 2
2 9
7 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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