Printable Hard Sudoku

Set 5c32lq. 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 6 5
5 4 7
9 7 3
9 1
1 9
3 9 5 7
1 4 8 7 3 9
3 5 2
3 9 8
Hard #2
9 7
6 4 8
2 3 8 5 1
7 4 3 1
1 2 5
6 8
9
4 9 1
2 1 9 7 4 3
Hard #3
2 6 3
7 6
4 8 9 2
2 4 7 1
2
3 1 6
8 2 4 6
3 5 4 7
9 4 8 5
Hard #4
3 8 2 7 5
4 7 8
3
1 2 6 9
8 5 4 3 2
7
4 3 9 5 8
3 8 4
6 4
Hard #5
1 8 2 3
8
5 1 4 6 9
7 2 4
7 9
1 6 3
9 1 8 2 5
2
7 3 9 8 6
Hard #6
3 4
5 9 3 6
9 7 6 4 8
4 8 5 7
2 7 1
7 6 9
1 6 7
5 3
3 4 8
Hard #7
6 3 2 9 4
2 3 5
2 6 1
7 9 3 2
4 5
4 7
4 2 9 6
2 1 9
5 4 8
Hard #8
6 5 3 7
3 6
7 9 8 4 5
5 4 7 8
4 5
2 6 9
8 5 9 2
2 1 4 8
1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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