Printable Hard Sudoku

Set b2u8q5. 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
4 5 1
7 3 4 8
5 1 6 8 3
3 6
6 9 7
2 4 5
8 5
6 7 1 3 2 8
2
Hard #2
8 6 3 4
1 9
6
2 1 7
9 2 7 5 6
5 8
2 8 3 7
4 9 2 5
3 4 8 2
Hard #3
3 6 1 5
7 3 6
4 1 7
5 2 8
5 2 4
9 1 6
6 5 3
4 9 6
1 3 7 9
Hard #4
4 1 9 2
3 4
5 1 9
9 7 3
8 7 1 6 2
5 6 4
3 7
1 5 8
2 4 9 6
Hard #5
4 7
6 3
2 9 1 4
7 3 4 6
4 9 7 2 8 1
1 8 3 4
5
7 4 5 6
8 2
Hard #6
6 8 4 5
1 9 6 4
4 6 1
2 5
6 8 2 3 7
7 9 5
3 4 5
2 7
4 7 8
Hard #7
8 2
3 9 4 6
4 7 9 2
1 8
7 9 1
5 3 8 2 4
1 4
7 2 8 1
7 6 5
Hard #8
8 9 5 2
1 8
6 2 1
7 5 1 6
4
3 8 9
3 1 9 5
8 7 6
9 2 4 7 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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