Printable Hard Sudoku

Set bzw6rr. 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
7 1
4 5 7 6
1 2 3
4 9 6 7
8 2 5
3 8 7 9
8 9 5 7
4 3
2 8 1
Hard #2
3 2 8
4 1
6 5 8 9 3
9 3
4 1 6
2 6 5
9 3 6
9 8 7
7 4 6 2 5
Hard #3
6 1
1 5 7
7 3 2 9
6 4 1 8 3
8 6 7
3 8
6 5 3
2 4 8 3
7 5 9
Hard #4
8 5 6
7
1 5 9 2
2 4 6
1 9 3 2
6 9 5 2
3 6 5
6 7 1 4
4 2 8
Hard #5
1 2 4
5 9 6 3 8
7 1 5
9 3 1
8 2 6
6 7
6 9 4
7 1 9 6
9 7 5
Hard #6
2 9 3
8 4
4 9 1 6
2 5 9
7 8 3 2
4 5
5 3 9 8
8 6 7
8 7 1 4
Hard #7
1 5 6 9
2
8 6 5
1 8
1 7 2 6
7 3 2 6 1
9 8
6 7 3 8 1
6 2 7
Hard #8
8 9 5 1
4
1 6 4
3 4 6
1 8 4
5 1 2 8
6 9 8 3
9 1 8 2
5 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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