Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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