Printable Hard Sudoku

Set 1v08vh. 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 2 4
7 3 8
2 7 4 1
5 9 8
1 8 7 6 3
8 5 1 7
3 1
7
2 4 6 7
Hard #2
6 1 3
4 2
9 4 7 6 1
7 9 6 1 8
1 5 8
3 5 7
4 7 8 3
9 6
8 4
Hard #3
5
6 7 4 2
3 2 8 5 1
2 9 5
7 3 6
1 7 2 3
7 8 3 2
8 9 7
6 4
Hard #4
6
7 8 9
2 8 1 3 6
8 3 5
3 7 4 2
9 5 7
6 9
2 7 4 9 8 3
3 1
Hard #5
1 2
9 4 6 8
7 6
2 7 8 4 1
6 1 3 5 9
3 7
2 9
8 1 2 5
5 6 3
Hard #6
8 3
6 2 8 5
1 7 2
4 5 6 8 2
8 4
7 3 9
3 2 5
3 8 4
2 9 3 7
Hard #7
8 2 4 3 5
7 5 2 3
6 4 7
1 9 4 7
3 5 9
8
7 4
4 7 5 2 1
5 6
Hard #8
4 3
2 7 9 6
6 9 8 4 2
3 7
6 2 7 3
3 5 4 1
5 4 8 7
6
9 8 6

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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