Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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