Printable Hard Sudoku

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

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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