Printable Hard Sudoku

Set vbodc9. 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 6
9
4 5 2
2 7 1 4
9 3 6
6 7 5
8 2 9
2 1 3 7
6 3 5 8 7 2
Hard #2
3 4
8 7 3
4 5 2 1
1 6 4 9
2 3
3 5 6 1
2 1 9 7 3
7 9 5
8 4
Hard #3
6 1 9 8
9 4 6
3 5
3 8 4
3 6 4 7
7 9 5
5 6 8
8 1 2
2 1 5 9
Hard #4
9 5 4 2 1
1 3
8 5 9 4
3 6 2 8
8 6 5
9 4 5
4 3 8 1
9
1 9 7
Hard #5
4 1 2 8
5 4
7 1 6 5
8 4 5
4 7 1
7 1 9 2
3 9
3 7 5
8 9 4 3
Hard #6
4 3 6 7
6 9 8 7
1 5 4
4 9 3
2 4
6 3 9
2 7 6 1 9
7
9 4 6 2
Hard #7
7 1 6
2 7 8 9
9 5 2 4
4 8 5 7
7 2 5 8
5 9 6
8 1
7 4 9
8 6
Hard #8
5 3 1 7
2 4 8 3
9 4 5
3 9
8 9 1 2 4
1 3
5 8
7 9 5
8 3 2 1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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