Printable Hard Sudoku

Set f26v4t. 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 3 5 8
3 5
7 1 8 9
9 2 3 4 7
8 9 1 6
5
8 7 4 9
1
4 9 3 1
Hard #2
7 6
8 9 3
8 1
6 5 7 1
3 9
1 2 9 4 3
3 5 1
4 8 6 5
7 6 1 8
Hard #3
7 6 5
3 2 4 7
8 5 1 4 9
6
7 1 2
4 5 8
2 3 4 9 1
5 8 1 2
4
Hard #4
2 5 8 9 6
6 1
7 6 3
1 6 5 2 7
9 7 3
5 2 1 4
5 2 3
6 4 5
6
Hard #5
4 2 5 3
8 4 2
5 6 1
7 3 1
3 1
2 7 3 4 8 9
7 9 6
4
5 9 3 8
Hard #6
3 4 6 2
2 1 7 4
7 1 8 2 3
9 2 1
7 9
5 2 4
5 2
1
2 1 9 6 8
Hard #7
3 2 1 5 4
8 7
1 5 8
4 8 7 2 5
7 9 6
4 3
5 6 2 3
9 4
4 1 8
Hard #8
8 6 3
6 2 9
5 7 9 2 4
1 9 5
7 8
2 7
9 4 3 5
9 1 7
4 5 1 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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