Printable Hard Sudoku

Set s88vrx. 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
5 8 3
5
8 6 1 4 7 2
2 7 3
1 9 6 8
6 2
4 5 2 1
3 8 4 7
3 6
Hard #2
7 3
6 8 5
2 1 8
8 5 4 3
8 7 1
6 1 2 4
2 4 7
4 5 9 2
8 5 3
Hard #3
4 9
7 9
1 6 8 2 3
9 1 8 3 2
3
2 3 6 7
6 2 4
2 3 1 6
4 3 5
Hard #4
6 2 1
7 9 5 2
7 6
1 7 2
2 9 5
6 8
9 5 7
3 8 5 1 7 9
7 1 6
Hard #5
5 6 7 3
7 3 5 6
2
6 2 9
9 1 4 8 5
4 2
9 4 8 6
4 1
2 7 9 8
Hard #6
3 6 9 2
7 8 6
3
1 4
6 3 4
9 2 3 4
2 8 1 6 5
5 9 8 7
2 6 3
Hard #7
2 8
1 3
3 7 8 4
3 2 4 6 7 5
6 2
7 6 8
5 4 1 9
7 3 2
5 8 7
Hard #8
1 5 4 9
8 6
6 8 7 1
3 4 2 6
5
7 4 8 1
1 4 3 6
8 6 7 2 9
2

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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