Printable Hard Sudoku

Set b3xpyt. 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
5 3
4 5
3 7 6 9
8 7 1
4 5 2 8
7 9 6 3
5 8
6 9 2
8 2 7 9 1
Hard #2
4 2 5
1 6 9
7 6 5 9
8 6 1
9 6 5 8
2 5 1 7
4 5 9 7
1 2 4 3
Hard #3
7 9 5 3 4 6 1
6 8
4
8 3 1 5 7
6 5 9 4
9
5 9
9 8 3 2
1 4 7
Hard #4
9 5 6 8
1
7 8 6 5
8 2 6
3 4 8 7 5
6
5 6 7 2 9
8 9 1
7 4 8
Hard #5
7 9 1
8 4 3 6
9 4 6
9 6 1
3 8 9 6
5 7 2
7 4
7 2 6 4 9
1 5
Hard #6
5 9 8 2 3
1
6 5 2 9
5 8 9 6
8 1 9
4 6 8 3
2 7 5
9 2 7
3 8
Hard #7
3 8
8 9 2 4
4 2
3 5 1
4 1 7 9 2
9 8 3
1 6 5 8
3 5 1
5 6 4
Hard #8
2 6 5
4 2 7
3 1 8
5 4 6 7
8 2
1 9 5 6
7 6 4 2 9 8
9 1
5 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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