Printable Hard Sudoku

Set 1p7pytu. 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 9
9 3 5
3 8 6 5
2 3 8
8 7 1 3 9
9 7 8 4 6
5 9 2
1
1 5 3
Hard #2
4 7 2 6 3
1 2
8 1 9
2 7
4 7 3 5 8
5 9
3 7 6 9 8
1 4 9 5
1
Hard #3
8 5 3 9 4
4 1
8 6 5
8 2
1 5 8
6 8 2 3
2 6 1 7
7 1 3 4
1 9
Hard #4
9 7 8 4
7 9 8 3 1 5
3
8 6 3
2 9 5
4 3 7 6
7 1 3 2
1
8 1 5
Hard #5
8 9
7 5 3
2 6 5
9 5 1 6
7 2
8 7 5 4
2 8 9
5 2 6 3
7 5 4 1
Hard #6
9 6 7 1 3
7 5
3 7
1 4 8 5 9
2 3
9 4 2 8
6 8 4 5
2 9
5 4 9
Hard #7
3 9
7 9 2
9 8 2 5 4 6
8 2 6
5 7 8 2
2 1 3
5 3
1
6 4 8 1 7
Hard #8
4 6 8
8 9 4 1
9 3 5
1 9
6 7 1 2 3
5 7
5 7 9
3 9 8 2
4 2 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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