Printable Hard Sudoku

Set 1uebe8v. 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
2 9 3 6 5
3 2 4
6 5 2
1 6
4 2 1
7 9 8
4 3 6 5 2
2 9 3 8
9
Hard #2
1 2 7
7 6 4 9
9 5 8 2
3 4
5 4 1
4 6 8 7
1 8 2 5
5
2 4 9 1
Hard #3
4 7 6 9
7 1
2 6 3
5 9 8 1
9 3 1 6
7 5 3
6 1 7 5
4 2 8
9 3
Hard #4
9 2 8
7 2 6
5 8 7 6
1 7 4 6
3 9 7
8 5
3 4 2
5 4 7 8 3
3 7
Hard #5
9 5 1
3 2 8 7 4
5 7 4 8
9 8 7 3 6
5 3
8 2 1 5
8
4
6 9 5 4
Hard #6
5 2 7
2 1 4 7 8
8
5 7 8
2 9 3
3 5 4 6
8 3 6 5
3 6 9 8
1 6
Hard #7
3 4 8
4 1
7 2 9 5
7 3
3 2 5 9
2 8 7
2 1 6 3
3 9 5 6
5 4 2
Hard #8
8 2 1
3 6 5 4
4 9 8 2
4 7
9 5 8 3
3 7 5 9 2
7
1 5 7 4
3 8

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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