Printable Hard Sudoku

Set bso2kg. 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 9 3 8
2 7
3 1 2
5 6 9 7
9 4 1
4 5 7 3 8
2 3
4 9 7 3 1
7
Hard #2
6 2
2 7 9
3 8 1 4
4 5 7
7 8 3
5 3 7
6 3 1 9 4
1 4 5
9 7 3
Hard #3
2 4 8
3 9 7
5 9 6 3
2 8 3
3 1 9 2
7 4 9
4 3 6 1
6 9
9 5 3
Hard #4
1 7
7 3 6
8 2 7
4 7 6 8 2
6 2 1 4
4 6
2 8 5 9
9
7 6 8 3 2
Hard #5
2 8 5 1
4 9 5
6 9 4
2
8 5 4 7
9 2 3 7
4 6 9 3
7 3 6
8 4 5
Hard #6
3 1 6
4 2 7
8 3
1 8 6 4 7
8 7 5 1
9 8
5 1 2 4
7
4 5 8 1 2
Hard #7
7 4
9 6 3
9 6 2
5 6 7 4
4 2 9 1
8 1 5
6 3 1
3 1 4 8
9 8 7
Hard #8
1 8
3 7 9 5
5 3
8 9
5 1 7 6 4
6 1 4 5
3 9 8 6
3 4 1
2 5 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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