Printable Hard Sudoku

Set xzb7tt. 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 8
9 6 1 3 2
2 1 7 9 5
5 4 9 3
6 3 2 4
8 5
8
8 2 3
2 5 6
Hard #2
1
1 3 6
7 6 3 5 1
9 8 4
5 1 8 2
4 1 6 3
3 1 2 9 6
5
8 2 3
Hard #3
6 5 1
4 3 9 7
7 6 4
4 8
7 3 4
2 9
6 3 2
3 1 7 4
9 2 4 1 5
Hard #4
3 9
9 5 6
8 3 9 7 1
5 1 6
3 9 4
4 9 2
1 3 9 7 8
8 4 2
1 2
Hard #5
6 2 1 9
1 3 5 9 7
7 9 2 4
2 4 8
4 5 9
8 9 6 1 2
4
6 8
7 1
Hard #6
2 1 8
7 5
6 9 8 3
9 7
8 3
1 7 5 8 2 3
8 6 7
7 3 9 4 8
8 1
Hard #7
8 2
5 3
7 2 5 8
7 3 9 1 8
3 1 4 7
6 4 1 3
4 1 6 9
8
8 7 1
Hard #8
6 9 5 8
4 2 3
6 5 1
5 3 1 7
3 9 1
8
9 7
4 2 3 5 8
8 5 9 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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