Printable Hard Sudoku

Set vc414k. 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
8 5
1 8 9
2 7 6
7 6 8 2 9 3
4 8
8 9 7 3
5 2
3 9 6 4
1 6 8
Hard #2
8 4 2 9
8 2 4 5 3
7 8
7 3 4
1 4
5 1 4 9 6
5 6
6 3 8 2
8 7
Hard #3
2 9
4 9 7
2 6 3 8 5
7 4 8
6 3 1
3 5 8 9
5 8 2
5 3 4
9 6 1
Hard #4
2 8 5 6
9 3
1 5 4
2 3 9
8 3 7 2
5
6 4 8
9 5 1 6 8
5 1 2 7
Hard #5
5 3 9 1
4 6 2
1 5 3
2 7 5
7 2 4 9
5 8
3 4 9 1
1 4 3
2 7 6
Hard #6
5 4 2
5 7
3 7 8 6 1 4
7 2 9
1 3 7 4
6 2
2 1 4 9
6 8 3
3 5
Hard #7
7 9
5 2 6 9 7
1 8 5 4
8 1 3 6
9 1
8 3 6
7 4 8
2 6 9 3 7
1
Hard #8
7 9 2 5 1
8
6 4 3 2 5
2
1 2 5 8 9
4 3 1 7
7 9 3 1
4 6 7
1

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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