Printable Hard Sudoku

Set bgsya0. 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
3 1
9 4 7 2 5
3 7 9
2 8
5 6 1 2 4
5 6
2 8 7 4 3
5 3 8 7
7
Hard #2
3 6
7 5 8 1
5 4
6 2 5 8 1
1 3 7
7 9 2 5
5 1 4
5 8 7
6 9 4
Hard #3
1 2 4
3 9 5
5 9
4 8 6
3 8 9 2
2 5 1 8
1 4 3 9 8
4 7 3
1 2
Hard #4
6 1 9
1 3 6
7 6 8 5
6 2 8
8 9 2 4
5 4 9
7 8 6
1 8 4 9
7 1
Hard #5
3 2 8 9
1 7 5
8 2
6 4
4 7 6 9
1 3 2
6 8 5 4 9 7
2 4
5 9 7
Hard #6
2 1 6 9
8 9 3 4 5
4 3
1 6 7 4
2 3 4 7
6 2
8 2 3
7 8
9 6 3
Hard #7
3 6 1
1 4 9 8 6
1 7
2 5
8 1 7
9 6 2
9 5 6 2
3 6 1 9 4
4 3
Hard #8
3 5 6 2
1 5 9 6 7
2 6 9
2 5
6 8 5 2
4 1 3
6 5
8 9
7 2 4 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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