Printable Hard Sudoku

Set q8upyj. 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
7 9 1 4
4 8 3 5
8
6 8 3 4 7 9
9 2 3 6 8
5
4 7
1 6
5 9 7 2
Hard #2
2 6 9 5
9 5 6
3
8 5 6
9 1 8
2 7 1 3
5 3 7
8 5 7 2
6 7 1 9
Hard #3
3 5 2 6 7
8 9 5 2 3
8
6 9 8 3 2
2 4 6 1 9
7 2 9 1
2 1 4
5
Hard #4
1 9 5 2
4 2 3 6
2 4 9
7 8
8 1 7 6
2 7 3 6
6 4
7 9 6
5 9 1
Hard #5
7 8 4
3
3 9 1 6
8 7 6
5 3
1 9 6 2 4
8 6 5
5 1 4 8 7 6
4 1
Hard #6
2 8 4
9 1 4 6
3 9
7 3 4 6
9 5 6 7 4 3
8
1 7 3
4 3 7 5
9 1
Hard #7
7 9
3 8 7 6
3 2 6 9
4 1 5 3
5 2 8
2 4 5
8 6 3
1 9
9 4 8 7
Hard #8
1 6
8 1 6 2 7 5
3 4 5 2
9 5 1
9 5
3 7 1 2
9 4
8 3 9
2 1 9

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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