Printable Hard Sudoku

Set 1urj8lf. 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 3 8
3 4 2 8 5
6 5 7
3 4 8
7 8 5 6 2
9 6
8 5 2
9
3 5 7 1
Hard #2
3 4 2
4 5 6
8 1
9 6 5
5 6 9 8 4
3 1
6
6 5 2 3 9 7
2 9 3 4
Hard #3
1 6 4 8
7 8 6
3 7 2
8 4 6 7
5 2 1
6 5 8 7 3
2 7 9
3 9 4
6
Hard #4
4 8
5 8 7
7 2 4
2 7
1 6 9 5
6 9 4
9 2 1
6 3 4 2 9
3 7 8 9
Hard #5
3 1 8 2
2 4 9
7 9 5 6
1 4 2 5
5 7
4 5 3 6
1
6 1 4 5
2 6 9
Hard #6
8 1 3
9 1 4
7 5 9
1 9
5 2 7 4
7 6 8
7
5 4 2 6
9 4 3 8 6 2
Hard #7
5 3
2 6 7
3 8 5 7 6 1
2 3
7 8 2
6 1
5 1 8 3
4 1 6
7 5 4 2
Hard #8
6 9
9 1 4
4 2 9 6 8
6 3 4 1
8 5
2 3
5 4 7 1
9 8 3 7 4
6 5

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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