Printable Hard Sudoku

Set rv5hys. 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 8 3
9 5 6 8
9
5 2 9 7
8 6 4 3
9
6 7 9 5
9 1 2
2 4 8 1 7
Hard #2
1 2 8 5
8 9 4
7 1
1 5 6
7 3 4 6 8
6 5 9
6 3 2
9 8 4
4 3 7
Hard #3
8 1 5 3
3 5 4 9
7
1 4 8
2 7 9
6 4 9 8
9 3 4 5
7 1 8
5 9 6
Hard #4
4 9 3
2 8
9 8
6 1 3 5 4
9 3 6
4 8 1 5 6
7
6 5 3 4 8
4 9 6
Hard #5
7 3 5 6
9 8 4
6 1 4
7 9 3
1 5
5 2
3 4 8 2 5
8 2 7 1 3
1 6
Hard #6
8 3
6 9 5 4 3 1
1 5 9 2 6
1 4 5
4 5 9
2 9 8 3
7 2 1
7
4 1
Hard #7
4 5 3 8
7 1 9
9 4 6 5
3 2 9
8
4 2 3
4 5 2 3
4 7
3 7 1 8 5
Hard #8
6 4
3 9 1
1 9 5 8 7
3 6 9
2 8 5
4 7 2
5 1 3
8 9 6
4 5 8 7

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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