Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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