Printable Hard Sudoku

Set 11v6opr. 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 5
6 3 7
9 6 4
4 2 5
5 9 3
4 2 3
7 3 1 6 4 9
8 1
6 2 1 5
Hard #2
1 3 7
5 4 1 7
2 1
3 6 1 5 2
2 4
2 1 8
9
7 8 4 2 6
6 1 5 4
Hard #3
3 1 7
3 2 5
7 4 8 6
6 7 3
9 5 1 2
1 7 2 3 5
6 9 8
5 1 4
2
Hard #4
8 4 6 3
8 6 1
4 1
5 6 8 9 3 4
1 2
7 4 8
7 3
6 2 9
5 4 3 2
Hard #5
8 1
9 7 4 2
2 8 9 6
2 1 3 4
9 7 1 6
5 6
8 5 4 9 3
6
6 1 7
Hard #6
7 3 8
2 1 4 8
5 2 9
6 9 1 7
3 9
9 4 8
4 9 7 1
5 8 7 3
3 2
Hard #7
1 5 4 2
2 7 8 4
9 4 6 2
6 9
9 4 8 1
8 2 3
6 4 3
5 1 8
9 1
Hard #8
7 6 9 1 2
9 6
1 5 8 4 7
6 8 3 1 9
7 9 3
2 3
5 4
2 1 5
6 2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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