Printable Hard Sudoku

Set ymlq60. 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 8
7 2 1
1 6 4 2 3
8
8 6 9 3
2 3 9 1 7
4 7 5
3 2 1
4 6 8
Hard #2
4 8
4 3 6 7
1 5 3 2
4 7 9 6
6 1 5
5 9 4
3 5 7 8
6 7
8 2 1
Hard #3
5 3 7
7 9 8 5
8 5
6 4 7 2
2 4
4 9 6 3
1 2 9 3
1 9 4
8 7 1
Hard #4
3 8 6 9 2 4
2 6 3 7
1 4 7 3
2 9 6 8
6
5 4
3 4 1
3
9 8 7 2
Hard #5
7 1 6 3
5 2
8 4
8 6 5
2 8 6 1
9 4 7
6 8 5 2 9 4
5 3
4 2 7
Hard #6
6 2 9 5
6 7 4 1
4 3
1 4 8
5
5 9 8 2 1
7 9
6 9 5
3 8 7 2 4
Hard #7
1 3 4 2 8 5
1 4 9
7 8
4 1 5
6 7 1
9 8
6 4 9 7
3 8 6
1 4 6
Hard #8
5 1 3
6 7 1 9
4 6
8 5 3 4
6
7 2 6 5 8
5 9
4 8 6 3 5 1
4 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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