Printable Hard Sudoku

Set ya6xcw. 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
1 7 6 4
3
1 9
4 2 8
8 7 5
3 1 8 5 9
1 4
5 9 6 1 3 8 7
7 9
Hard #2
3 8
4 5 6
6 2 1
8 9 5 1
7 5 3 6 8
7
6 9 5
6 8 3 2
1 7 3 4
Hard #3
8 6 7 2
5 6 4
5 3 9
1 3
4 9 1 6
8 9
3 9 2 7
9 8 6
7 4 9 5
Hard #4
5 6 7
2 6
3 1
8 1 2 9 5 3
9 3
3 1 7 4
8 9 5
2 6 1 8
5 3 6
Hard #5
5 4 8
9 5 3 6
8 3 6 2
8 7 6 2 5
2 9 4 7
4 5 3
1
1 6 2
8 3
Hard #6
2 6 4
7 4 3
7 6 2
6 5 3 7 9
2 5
3 8 2 5
4 6
8 9 1
3 2 9 8
Hard #7
6 1
9 7 4
6 2
8 2 5
7 4 8 1
5 8 1 6
2 4 9 3 7
8 9 2
3 8 9
Hard #8
9 1
3 8 7 2
8 2 6 9
1 5 2
4 8 1
2 3 4
4 2 9 6
9 7 6
7 2 3

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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