Printable Hard Sudoku

Set 1pah72g. 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 2 9 5 3
6 4 9
2 8 1
1 8 6
9
2 6 7
8 9 3
9 5 4 8 1 2
7 4
Hard #2
2 1 7
6 2 5
3 9 2
3 8
7 1 6 2 3
9 2 1 7
1 9 7 8
2 1
6 9 7
Hard #3
1 4 2
4 7 3
9 8 3 2 1
3 6 9 1 2
8 6 2 4
5 8 3
4 5
1 4 6
9
Hard #4
7 3
8 6 3 2
4 6
5 2 4 1
6 3 9 2
9 8
5 3 2 8 4
8 4 6 7
1 8
Hard #5
2 1 5 4 6
4 3 1 7
8
5 9 1 2 7
8 1
6
6
8 3 5 2 7
2 8 1 3 5
Hard #6
2 8 7
6 2 5 1
3 9
5
5 9 2 4 7 6
3 7
5 6 4
8 6 3 9 2
1 6 8
Hard #7
3 2 1
6 5 8 1
8 3 9 2
5 6
7 1 4 3 2
3 2 7 9 6
4 6 2
9 4 1
Hard #8
2 6
3 7
5 7 1 8 3
8 7 2 5
1 5 6 8 7
2 6 4
9 6 5
3 4
8 3 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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