Printable Hard Sudoku

Set e0czv7. 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
5 9
1
6 7 1 3 5 8
8
6 2 4
9 4 5 1 3 6
6 8 9
9 7 6 8 1
1 2
Hard #2
5 7
9 2 3
8 2 6 1
7 9
1 8
8 5 4 1 2
8 9 2
5 8 1
3 1 2 4 6
Hard #3
9 6 4
4 5 1
2 7 8
2 5 9
4 5 3
3 8 2
9 8 7 1
7 5 9 6 2
2 6
Hard #4
6 8 4
8 5 9 3 7
9 3
6
7 1 8
4 2 9 7 1
2 3 9 8 4
4 5 6
6 4
Hard #5
8 5 1 3
6 3 2
7 4
5 2 4 6
6 7 1 5
5 7 9
5 2
2 9 3 6
1 4 3
Hard #6
8 5 3 6
7 9 4
2 9
4 9 1
9 6 2 7
5 1 8 9 4
9 6
5 8 1 6
3 7
Hard #7
8 1 4 5 3
2 7 3 9
4 7 9
2 5
6 8 3
5 2
8 2
7 6 5
1 3 2 7 8
Hard #8
1 2 7 6 5 9
2 4
9 5 3
7 5 2 4
5 1
4 3 1 7 8
8 9
1 3 2
7 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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