Printable Hard Sudoku

Set xxkp5y. 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
8 7 6 4 3
6 3
3 2 1
5 6 7
9 7 5 4 2
4 9
2 5 1
2 4 7 8
9 4
Hard #2
3 4 2 8 6
2 6 8
4 3 5
9 4 2
8 7 9 5
4
7 6 9 3 4
8 1
4 7 2
Hard #3
2 6 9 7
4 7 2 1
3 1 5 9
6 1
4 5 3 6
9 3 6 4 5
1 2
7 4
5 9
Hard #4
4 2 7 5
3 8 1
8 4 3 7
5 6 7
6 4 2
3
3 6 7 8 2 9
2 6 3 4
8
Hard #5
8 3 7 9 4
1 3 9 7 8
7 1
3 5 4
7 4 1
6
5 1 2 8
7 6 4 5 2
9
Hard #6
4 3 5 8 2
8 6
5 7 9 8
8 1 4
8 3 2 6 5
7 1
5 6 9 2
9 4
7 2
Hard #7
9 5
3 5 6 7
9 3 8
3 6 5
4 7 9 1 8
2 1 6 3
1 7 5
1 7 4
7 9
Hard #8
7 1
1 9 8 2 6
9 8
8 4 6 1
2 3 9 7
7 5
9 6 3
3 5 2 7
8 3 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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