Printable Hard Sudoku

Set ttv7mi. 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 4 5 9 1
3
7 2 1 8
9
7 4 5
7 6 2 9 8
2 3
1 8 3 6
9 8 5 7
Hard #2
1 8 2
8
4 9 8 3
5 7 1
7 5 9
6 9 8 2 3
9 7 4 2
7 6
8 3 5 4
Hard #3
3 1 9 5
5 9 8 2 6
5 4 1
4 8
5 8 2
4 6 3 7
7 4
6 5 8
9 1 7
Hard #4
1 2
7 1
3 6 4 9
6 1
8 5 7 3
3 2 7 1
5 2 9 4 3
7 3
7 1 9 8
Hard #5
7
6 7 2
1 2 9 6
4 8 5 6 1
5 2 3
1 4 3 9
7 6 5 9
5 1
9 2 8
Hard #6
6 9 3
9 6
1 2 7
3 6 8 4 1 5
1 5
7 1 8 2
4 7 8 3
2
4 3 9 8
Hard #7
4 5 7
9 2 3 4 8
1 6
7 4 9
3 9 5
7 8
1 7 2 5 6
8 3 7 2 4
7
Hard #8
8 1 6 9
7 4 5
2 9 8
1 2 7
8 3 4
5 1
3 2 4 1 8 5
4 2 9 3
1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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