Printable Hard Sudoku

Set 1q5pdak. 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 4 9 3 2
6 9 1 8 5
4
1 7 4
5 6 9
4 8 9
1 9 6
4 7 5
8 6 2
Hard #2
6 7 3 2
9 4 1
7 2 5 1 8
9 4 1 7
7 9 6 4
3 8
6
6 4 8 5
9 1
Hard #3
4 6
7 6 5 3
1 8 7
8 4 1
9 2 4 7 6
9 1 8 4
7 6 9
9 5
1 2 4
Hard #4
5 6
7 6 8
2 1 5 4 7
1 8 9
3 9 6 4 5 1
3 4
3 2 6
1 5 6
5 1
Hard #5
3 7 8 1
8 9 4 2
7 6 8 3
4 8 9 6
1 9
3 5 7
1 3 8
8 1 9
3 6
Hard #6
9 4
8 6 2
5 7 6 1 4
4 9 5
5 9 8 2 1
7
7 8 1 3
3 2 7
9 2 5
Hard #7
8 5 2 7 4
9 5 1
7 1 6
1 9 5
1 2 7
3 8
5 4
3 4 9 1 8
8 2 6
Hard #8
6 9 1 3
8 2
4 6
3 4 8 7 9
7 1 2 4
9 5
8 4 2 7 3
1 3 2 8
5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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