Printable Hard Sudoku

Set 596b9t. 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 1 8 5
8 2 4
3 7 6
6 1 7
7 2 3 5 4 6
1 3 9 7
7
5 2
5 2 8
Hard #2
8 9 1
9 2 5 3 6
1 4 9
3
9 1 5 2
8 6 5
8 4 1
9 7 3
3 2 9 7
Hard #3
9 3 2
1 7 6
2 4 3 6 1
2 5 9 7
3 4 6 8
1 5 6
7 4 8 5
4 2 6
Hard #4
5 7 9
9 1 8 5
4 7 6
1 4 8
2 7
6 9 1
3 1 9
8 3 2
4 1 6 3 8
Hard #5
7 8 2
6 5
5 4 1
1 5 9 2
6 1 9 7
2 3 4
3 4 9
7 6 8
6 8 3 2
Hard #6
3 4 6 2
5 1 7
8 7 2
9 5 6
8 2 3 6 1
2 8
4 9
7 9 6
4 5 1 8
Hard #7
7 2 3 1 8
8 3
5 4 9 7
9 3 8 7 6 5
4 9
8 3 2
2 6 5
3 7 1
6
Hard #8
5 9 7 2 1
6
2 3 5 4
9 7 3
7 2 4
6 5 9 7
3 9
8 1 3 5
5 9 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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