Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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